Gratgnir, Treasurer Superior

Flying, menace
At the beginning of each player’s end step,
they must pay 5 mana or take 7 damage. If
you control Gratgnir, Treasurer Superior and
do not pay this cost, double the damage and exile this creature.
When Gratgnir dies, all players create five Treasure tokens.

“True power comes from money and fear. I have mastered both.”