drivnod / triggers with zombies with decayed
Drivnod should either work properly or be deleted from the game. As an example, in an interaction with Drivnod on the battlefield, Gixian Infiltrator and zombies with decayed. The rule on Gixian infiltrator specifically states "whenever you sacrifice another permanent, put a +1/+1 counter on Gixian Infiltrator. Zombie tokens with decayed say "Sacrifice this creature at the end of combat" and Drivnod says if a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Therefore there should be two not one +1 counters added to Gixian Infiltrator. If you feel this should not trigger, the wording on the specific cards should be made more accurate.
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[Deleted User] commented
Gixian Infitrator triggers on sacrifices not on creatures dying, these are two different game actions. There is no interaction with Drivnod.