Ritual Summon
From Yu-Gi-Oh!
A Ritual Summon is a Special Summon that is conducted through the effect of a Ritual Spell Card. These Summons usually require Tributes equal to the Level of the monster being Summoned, from either the field or the hand.
A Monster that was properly Ritual Summoned can be Special Summoned from the Graveyard unless otherwise dictated on a card's text.
Gameplay and Glossary
