
X can't be 0.
Target spell's controller exiles it with X delay counters on it.
At the beginning of each of that player's upkeeps, if that card is exiled, remove a delay counter from it. If the card has no delay counters on it, the player puts it onto the stack as a copy of the original spell.
Ertai's Meddling has 2 printings, first in Tempest (1997). EDHREC ranks it #15,985 among Commander cards. It appears most in Lier, Disciple of the Drowned decks (125 on EDHREC). It has 10 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.