Research the Deep

First strike Reinforce 1—1W (1W, Discard this card: Put a +1/+1 counter on target creature.)

Target player discards X cards at random.

Prowl 2B (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.) When this creature enters, if its prowl cost was paid, search target opponent's library for three cards and exile them. Then that player shuffles.

Draw X cards.

Flying U: Put this creature on top of its owner's library.

Whenever this creature attacks alone, it gets +1/+1 and gains trample until end of turn.

As this artifact enters, choose a creature type. Whenever you cast a spell of the chosen type, put a charge counter on this artifact. Creatures you control of the chosen type get +1/+1 for each charge counter on this artifact.

Whenever a creature you control enters, you may look at the top X cards of your library, where X is that creature's power. If you do, put one of those cards on top of your library and the rest on the bottom of your library in any order.