one piece card game boa hancock SP OP01-078 SR 500 Years in the Future PRB02-017 Boa Hancock (SR)

That's where we come in

If we keep countering everything, we can run out of cards

[c]Esper Sentinel[/c] discourages opponents from spending all their mana on spells, and [c]Leonin Arbiter[/c] makes it difficult for players to search their libraries

But if you sacrifice it in response to its enter-the-battlefield trigger resolving, the leave the battlefield trigger happens before the card is exiled meaning your opponents card gets exiled forever

Creature - Elemental Color tag templates(None) Beetleback Chief When this creature enters, create two 1/1 red Goblin creature tokens

When you mill your opponent, there's no real guarantee what you're going to hit