Yasuke, Noble Warrior

Freerunning {x}{b/r}{b/r} (You may cast this spell for its freerunning cost if you dealt combat damage to a player this turn with an Assassin or commander.)

When Yasuke, Noble Warrior enters the battlefield, if it was cast for its freerunning cost, put {x} +1/+1 counters on it where {x} is the number of mana additional mana spent to cast it.

Trample