Zirda, the Dawnwaker

Companion — Each permanent card in your
starting deck has an activated ability. (If this card
is your chosen companion, you may cast it once from outside the game.)
Abilities you activate that aren't mana abilities
cost {2} less to activate. This effect can't reduce
the mana in that cost to less than one mana.
{1}, {t}: Target creature can't block this
turn.
"That's a direwolf."
— Jon Snow