Delvefall
Sarulf, Realm Eater

Sarulf, Realm Eater {1}{B}{G}

Legendary Creature — Wolf

Whenever a permanent an opponent controls is put into a graveyard from the battlefield, put a +1/+1 counter on Sarulf.
At the beginning of your upkeep, if Sarulf has one or more +1/+1 counters on it, you may remove all of them. If you do, exile each other nonland permanent with mana value less than or equal to the number of counters removed this way.

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Cards that do something similar expected a card that isn't here?

Tetravus
Tetravus 80%
#23275
"At the beginning of your upkeep, you may remove any number of +1/+1 counters from this creature. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and "This token can't be enchanted.""
Magmasaur
Magmasaur 80%
#26893
"At the beginning of your upkeep, you may remove a +1/+1 counter from this creature. If you don't, sacrifice this creature and it deals damage equal to the number of +1/+1 counters on it to each creature without flying and each player."