U/B Lock (Casual of course)

Flying Whenever the first noncreature spell of a turn is cast, counter that spell.

Each player can't cast more than one spell each turn.

Imprint — Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with this artifact to its owner's graveyard. , : Create a token that's a copy of a card exiled with this artifact. It gains haste. Exile it at the beginning of the next end step.

When this creature enters, creatures your opponents control get -2/-2 until end of turn. Whenever a creature an opponent controls dies, that player loses 2 life.