Every time you read Feldon, it does a different thing. That's probably because we shortcut cards a lot and Feldon does a lot of unusual things. Imagine it was:
1RR Filip of the Fourth Path
Legendary Creature - Human Artificer
1RR, T, exile a creature card from your graveyard: Create a token that's a copy of the exiled card. It gains haste until end of turn. At the beginning of your next end step, exile that token. Activate this ability any time you can cast a sorcery.
It's much, much worse in many different ways and still reads almost the same!
1RR Filip of the Fourth Path
Legendary Creature - Human Artificer
1RR, T, exile a creature card from your graveyard: Create a token that's a copy of the exiled card. It gains haste until end of turn. At the beginning of your next end step, exile that token. Activate this ability any time you can cast a sorcery.
It's much, much worse in many different ways and still reads almost the same!