Trample
At the beginning of your end step, each player creates a 1/1 green Plant creature token.
Whenever a creature token dies, put a +1/+1 counter on Grismold, the Dreadsower.
Each Plant token is owned by the player who created it. You don’t own them all.
If Grismold is dealt lethal damage at the same time as a creature token, Grismold won’t receive a counter from its ability in time to save it.
In a multiplayer game, if a creature token dies at the same time its controller loses the game, Grismold’s last ability triggers.