Delver and cloudfin raptor fit in very different decks. You should pick one, since they don't synergize with eath other. Since Raptor is easy and given the title of this thread, let's focus on delver:
1cc
Triple Delver I think. I'd add less, but I don't think there's another 1 drop this deck wants, because:
Other suggustions: None
2CC
- phantasmal image: Good all around. Should be included, but he'll be fought over
- snapcaster mage: See above.
- riftwing cloudskate: Bounce + Threat + Evasion. Love the thing
- looter il-kor: Evasion, Filtering, but needs equipment to be a reasonable clock. Multiple copies likely depend on multiple runechanter's pike
- frostburn weird: Is he passable as just a dude? Like, assuming there's no devotion stuff going on. I've never played with the guy, but I could see it.
- sygg, river cutthroat: This one interests me. I really wish he were a 2/2, but maybe that's just me.
- tidebinder mage: Not a fan, since unlike lifebane zombie he's quite aweful when you aren't hosing with him.
- coralhelm commander: This guy is awesome. Fits well at the 2, 4 and 5 slots on your curve as bad bear, phantom monster and air elemental. Fits the theme much better than Tidebinder above
- spellstutter sprite: Another solid disruptive creature with low power. Don't feel you need extra faeries to make it good, this guy eating duress or non-turn-one 1 drops randomly is good enough.
Other Suggustions:
Faerie Conclave, if you count like I do.
Vaporkin/
Welkin Tern could fit in, but I've always been wary of random beaters that can't block ever since I noticed my fascination with shadow guys basically had the black mage playing with a leyline of
bedlam just for playing swamps.
Withdraw is a strong flexible bounce spell, and
Undo is it's derpier more consistent cousin.
3CC
- serendib efreet: The best blue beatdown creature.
- vendilion clique: Actually it's probably this one. But damn is she (they?) fragile.
- man-o'-war: A solid inclusion, but it isn't winning any games on it's own, you need to be using this to press your advantage, something a deck with few 1 drops can basically never do. I haven't given up hope however.
- fettergeist: I had a lot of problems with this one because it's so hard for decks to go threat light. That, and sacrificing a land (Come on, that's what that upkeep means) is so much worse than 1 damage from serendib most of the time, given how well he blocks.
- pestermite: Here's a premier beatdown creature. Fog a guy, untap a blocker, reasonable power, the whole deal.
- vexing sphinx: Large creature with a small fading count. Thats a steep upkeep, and I'm not sure me (or my drafters) would bite.
- old man of the sea: This is a control card, don't pretend. Everything about Vedalken Shackles applies here, but in less broken ammounts. Don't count this as delver support.
Other Suggustions:
Kira, Great Glass-Spinner is an amazing card for protecting larger threats, which is a shame because blue's creatures are all so small.
Calcite Snapper is a solid one here, and if you're okay with creatures who can't block
Wake Thrasher is large and in charge.
Forbid is probably one of the better ways of pressing a board advantage in cube, and
Psionic Blast fits in well here.
4CC+
Since you so helpfully neglected the best CMC in magic
- Venser, Shaper Savant: He's like man-o'-war but he also stops their wrath. Also the new FTV printing is preety
- Sower of Temptation: Swingy. Anything that imitates control magic but control decks don't want is sweet in my book.
- Talrand's Invocation: I mention this because blue's creatures are all so fucking small, so it's rare to see 4 power of evasion guys for 4 mana, even if it does get blanked by Giant Spider hard.
- Opposition: Give people a chance to draft blue creatures and not feel bad about it! It's double blue so it doesn't find it's way into the GW tokens decks that often, assuming you do have those kinds of decks.
- Trechery: While a lot can be said for this effect, I like it better here than in control, since you'll actually do something with the mana other than bluff mana leak.
Other Blue Support
- force spike: Good
- spell pierce: Slightly less good, but still good. Think of it like gods willing but sometimes it counters a wrath
- Mana Leak and co: Solid. You'll be competing for them, but I don't think we should be adding more than we already run, since for every time they counter doom blade someone the next table over is using them as doom blade, and you shouldn't have too many doom blades
- bident of thassa: Interesting. Weather this is good is an indicator of the archetype, since bloody nobody wants this except maybe the token deck with WAAAAAY too much manafixing.
- daze: Essential. Nobody expects the daze.
- stifle: I'm trying it now, but this one is again cube dependant. Bonus points if you run extra fetchlands, but there might not be much else worth stifling. It's worth noting that it's 2 mana cousin trickbind is infinitly worse, sadly (Especially given the 30+$ price difference)
- force of will: I've never had much success. Maybe I'm doing it wrong?
- favorable winds: I don't really like anthems unless your dudes are actually multiple doods. But I'll admit that's personal bias. I've never ran glorious anthem in WW, I don't think I would run this here either.
- gravitational shift: This is a control card which is essentially double urza's armor unless you're playing against this very deck, in which case it gets boarded out faster than Pyroblast in the Modo Cube. I guess it could be a funny trap? Also see thoughts concerning favorable winds.
- Cantrips: I wouldn't go much further than 6 personally (Ponder, Preordain, Something, and Triple Brainstorm). They are good in the deck since they both help delver flip and are live if you don't have a delver, but after a certain point your deck is just half cantrips and you have no way of winning.
Multicolor Support
W: lingering souls, spectral procession, squadron hawks, midnight haunting?
--I hope so, that's what this whole thread is about
B: oona's prowler, tombstalker, 5-6 1cmc discard spells, sinkhole?
--Prowler probably not, Tombstalker probably not (8 mana is a lot), 1CC discard is sweet but hard to come by. Don't double up on thoughtseize, it leads to bad gameplay
R: young pyromancer, guttersnipe, earthquake, rough/tumble?
--Pyromancer YES, Guttersnipe maybe, Earthquake is too slow, rough//tumble maybe. There's probably more cheap doesnt-hit-fliers sweepers, and they might be the key in small numbers.
G: nah
--This should work the same way you have white outlined if we can find the right cards.
UW: geist of saint traft, drogskol captain?, pride of the clouds?
--Geist yes, Captain no, pride hell no (So slow)
UB: duskmantle seer?, nightveil specter?
--Seer yes, Specter maybe, Iunno. I'm sticking with finkel at least until a foil one isn't a bajillion dollars
UR: help
--Literally any cantrip burn,
Spellheart Chimera,
Izzet Charm,
Jilt
UG: edric, temporal spring?
--Love both of those,
Mystic Snake probably plays well (assuming he isn't too slow) and
Trygon Predator is a solid all around card who does nicely here, disrupting signets and swords alike.
Lands: dunno either (riptide lab?!)
--I mean
riptide lab doesn't seem bad... Probably utility draft only though, I don't see that being main cube material.
