mtg whenever a card is exiled Graveyard Trespasser | Innistrad: Midnight Hunt Foil | Standard that creature becomes a copy of a creature card exiled with Assimilation Aegis. Throes of Chaos (WHO) #818

Shoreline Looter Shoreline Looter is the rat version of Looter il-Kor, although one that can draw without discarding if you have threshold

Jace, Cunning Castaway Jace, Cunning Castaway promises tons of looting for a proactive deck, though its other abilities are weak

We have countless dual-color land cycles, Treasure, and card draw, and so I dont think that argument is worth much

You see, whenever it attacks or becomes the target of a spell, you get to create a treasure token

How many cards are there that trigger when your opponents play cards

Arbor Elf might essentially provide you mana, but is not a mana ability