Edgewall Innkeeper

Whenever you cast a creature spell that has an Adventure, draw a card. (It doesn't need to have gone on the adventure first.)

Lucky Clover

Whenever you cast an Adventure instant or sorcery spell, copy it. You may choose new targets for the copy.

Exile the top two cards of your library. Until your next end step, you may play those cards.

Whenever you cast a spell that's white, blue, black, or red, put a +1/+1 counter on this creature.

Flying
Whenever you cast an Adventure spell, you may copy it. You may choose new targets for the copy.

Mill seven cards. Then put all cards that have an Adventure from among the milled cards into your hand.

Trample
Permanent spells you cast that have an Adventure cost {1} less to cast.