Mohg, Lord of Blood

Flying, First Strike
Whenever Mohg, Lord of Blood deals combat damage to a player, you and that player create that many Blood tokens.
Whenever a Blood token an opponent controls is put into the graveyard, that player gets one Bleed counter.
Whenever a player has 10 or more Bleed counters, they lose half their life, rounded up. Then remove all blood counters from that player.