
Threshold — As long as there are seven or more cards in your graveyard, this enchantment has "Whenever an opponent casts a spell, you may put a creature card from your hand onto the battlefield."
Hunting Grounds has 4 printings, first in Judgment (2002). EDHREC ranks it #11,619 among Commander cards. It appears most in Karador, Ghost Chieftain decks (573 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.