The Boon of the Centipede

Whenever a source deals damage to you, prevent
1 of that damage.

Whenever a creature enters the battlefield, you may pay {1}. If you do, The Boon of the Centipede deals
1 damage to that creature.

"The party wiped the sweat from their foreheads. All
at once, the beast who ravaged Maru lie still, dead,
and rapidly decaying."