Trap Wormhole

[Agro]

Trap Wormhole [Agro Single]
Trap
When your opponent Summons a monster(s) with 2000 or more ATK: banish 1 monster from your Graveyard; take control of that monster. You must control no monsters to activate and resolve this effect.

[Toffee.]

Pretty interesting, as far as high-risk high-reward goes.
That, or its an out to the Opponent using Dark Hole, before they Summon a bunch of monsters(I think)