Capricious Sliver

Sliver anthem effects are usually about combat math: extra bodies, keyword grants, the incremental swarm that turns a wide board into lethal. This one grants an engine instead. Every Sliver that connects turns a swing into a card, and because the exiled card is playable that turn, a profitable attack step refuels the board that made it profitable. The design leans into the archetype's defining weakness. Go-wide Sliver decks flood the board and then run out of gas; the payoff for winning combat has always been more combat, never more cards. Bolting a per-creature impulse-draw trigger onto the tribe converts each unblocked attacker into resources that let you rebuild through removal, which is precisely the wall a swarm strategy hits once the opponent starts trading one-for-one. The impulse framing (exile and play this turn rather than draw into hand) is where the restraint lives: you have to use what you dig into, on curve, or lose it, so the trigger rewards a board that already spends its mana every turn. The 3/3 body for four is deliberately unremarkable, because the card is not asking to attack on its own; it is asking a board of Slivers to attack and be paid for it.