Food Chain

Exile a creature you control: Add X mana of any one color, where X is 1 plus the exiled creature's mana value. Spend this mana only to cast creature spells.

Squee, the Immortal

You may cast this card from your graveyard or from exile.

Eternal Scourge

You may cast this card from exile.
When this creature becomes the target of a spell or ability an opponent controls, exile this creature.

Loot, the Key to Everything

Ward {1}
At the beginning of your upkeep, exile the top X cards of your library, where X is the number of card types among other nonland permanents you control. You may play those cards this turn.

Misthollow Griffin

Flying
You may cast this card from exile.

Aluren

Any player may cast creature spells with mana value 3 or less without paying their mana costs and as though they had flash.