Callias Diouri, Sapphire Scion

Whenever Callias Diouri, Sapphire Scion deals combat damage to a player, that player loses 1
life and mills a card, then you gain 1 life and
scry 1.
Whenever you attack, you may pay {2}. If you
do, target creature can’t be blocked this turn.

— "With him by my side, I have no fear."