From the Vault: Lore: Cabal Ritual
|Edition:||From the Vault: Lore|
Add to your mana pool.
Threshold - Add to your mana pool instead if seven or more cards are in your graveyard.
Cabal Ritual is yet another strong ritual effect used to enable the combo in Legacy Ad Nauseam Tendrils. When paired with Dark Ritual, casting Ad Nauseam can be done fairly easily with plenty of mana left over to increase storm count after you've filled your hand in order to cast a lethal Tendrils of Agony.