Fissure Wizard

Rummaging stapled to a body, priced so the body is close to free. The two-mana Goblin exists to carry an enters-the-battlefield loot, and the design choice here is telling: the discard is optional and the draw is contingent on it, so no card in hand to pitch means no card drawn, and the wizard just stays a two-power one-toughness attacker. That optionality keeps this from behaving like a hard cycling clause; you leave the trigger idle when your hand is already what you want and cash it in only when you have a dead card to launder into a live one. The real value axis is not card advantage (it is a wash, one for one) but selection plus a graveyard deposit, which matters more to the discard pile than to the hand. Anything that wants specific cards in the yard (delve, flashback, reanimation fodder) treats the loot as the point and the fragile body as the delivery fee. As a creature carrying the effect rather than a spell, it can be blinked, bounced, or otherwise re-triggered, turning a one-shot rummage into a repeatable filter for decks built to abuse enter triggers. Plain in isolation, deliberately so: this is connective tissue, a cheap creature that smooths draws and stocks a graveyard without asking the deck to bend around it.