OsVermis, Skeletal Spitter

Trample, Flash, Haste
When OsVermis enters the battlefield or attacks,
deal 1 damage to any target and that target gains,
"At the beginning of each turn phase, deal 1
damage to this creature, planeswalker, or player."
OsVermis can't take damage or leave the
battlefield before and after combat phase of each player's turn.