Darius, the Hand of Noxus

Trample, haste
Whenever one or more creatures you control deal combat damage to a player, that player gets a bleed counter.
At the beginning of each player's upkeep, Darius,
the Hand of Noxus deals damage to that player equal to the number of bleed counters they have.

Players can't gain more than 5 life each turn, reduced by 1 for each bleed counter they have.