Tararok the Sky-Splitter

Trample
Whenever Tararok the Sky-Splitter deals combat damage to a player, roll a d20.
1-10 | Tararok the Sky-Splitter deals X damage
to defending player, where X is the number of creatures they control.
11-20 | Tararok the Sky-Splitter deals X damage
to defending player, where X is the number of permanents they control.