I don't have a ton of good options for Yedora, but it is a trippy card. The classic is Life and Limb, maybe that has game in a cube so heavily focused on lands?
There is this one if you want a better rate morph
And as for combo potential, these two can work
Shrieker probably falls into your morph problem, you wouldn't want to run it by itself, so it's mostly a good rate combo card. Self-contained, but still mostly there for Yedora.
Mist is a great card on its own, but you either need a cheap creature you can cast for a single
, a sacrifice outlet that produces mana or a Lotus Cobra type effect. Might just be too powerful by itself though.
There is this one if you want a better rate morph
And as for combo potential, these two can work
Shrieker probably falls into your morph problem, you wouldn't want to run it by itself, so it's mostly a good rate combo card. Self-contained, but still mostly there for Yedora.
Mist is a great card on its own, but you either need a cheap creature you can cast for a single
, a sacrifice outlet that produces mana or a Lotus Cobra type effect. Might just be too powerful by itself though.