Tobias, Steadfast Tactician

Exploit (When this creature enters the battlefield, you may sacrifice a creature.)
When Tobias exploits a creature, target creature gets -3/-3 until end of turn.
"You'd be wise not to underestimate him. Do not be fooled by his affable ways and occasional indecipherability. He's cunning that one."
- Darien, King of Kjeldor