Infernity Necromancer [DT04-EN052] Common Legacy of the Valiant You can only use each

You can only use each effect of "Duoterion" once per turn

destroy that monster at the start of the Damage Step (without damage calculation)

Set: Crossroads of Chaos Card type: Synchro/Effect Monster Rarity: Ghost Rare Attack: 2400 Defense: 1800 1 Tuner + 1 or more non-Tuner monsters When this card is Synchro Summoned

or leaves the field because of an opponent's card effect while its owner controls it: You can inflict 500 damage to your opponent for each "Frightfur" monster in your Graveyard

Infernity Necromancer [DT04-EN052] Common Legacy of the Valiant You can only use eachSet: Duel Terminal 4 Card type: Effect Monster Rarity: Common Attack: 0 Defense: 2000 When this card is Normal Summoned, it is changed to Defense Position. If you have no cards in your hand, this card gains the following effect: Once per turn, you can select 1 "Infernity" monster in your Graveyard, except "Infernity Necromancer" and Special Summon it.