ExploitExploit is a triggered ability. “Exploit” means “When this creature enters, you may sacrifice a creature.”
A creature with exploit “exploits a creature” when the controller of the exploit ability sacrifices a creature as that ability resolves. (CR 702.110) (When this creature enters, you may
sacrificeTo sacrifice a permanent, its controller moves it from the battlefield directly to its owner’s graveyard. A player can’t sacrifice something that isn’t a permanent, or something that’s a permanent they don’t control. Sacrificing a permanent doesn’t destroy it, so regeneration or other effects that replace destruction can’t affect this action. (CR 701.21) a creature.)
When this creature exploits a creature,
destroyThe only ways a permanent can be destroyed are as a result of an effect that uses the word “destroy” or as a result of the state-based actions that check for lethal damage (see rule 704.5g) or damage from a source with deathtouch (see rule 704.5h). If a permanent is put into its owner’s graveyard for any other reason, it hasn’t been “destroyed.”
A regeneration effect replaces a destruction event. See rule 701.19, “Regenerate.” (CR 701.8) target planeswalker.
At the beginning of your upkeep, this creature deals 1 damage to you.