Karth Frostbrood

First strike, trample
Whenever Karth Frostbrood deals damage to a
player, you may pay {s}{s} X times plus one where
X is the number of creatures that blocked Karth Frostbrood this turn. If you do, put a +1/+1
counter on it for each time you payed the cost.
"Jotmir's throne belongs to me. Birth rite does not
dictate that"