B.E.S. Crystal Core [DR04-EN021] Super Rare Pendulum/Tuner/Effect Monster You can only use each

You can only use each effect of "Jet Warrior" once per turn

it gains 500 ATK for each card your opponent controls

which you'll need to Summon Ursarctic Septentrion – an incredible Synchro Monster with the power to suppress the effects of monsters without Levels

• At the start of the Damage Step

or you're just starting to build your Extra Deck with cards from Duel Devastator

B.E.S. Crystal Core [DR04-EN021] Super Rare Pendulum/Tuner/Effect Monster You can only use eachSet: Dark Revelation Volume 4 Card type: Effect Monster Rarity: Super Rare Attack: 2100 Defense: 1000 When this card is Normal Summoned, put 3 counters on it. This card cannot be destroyed by battle. If this card battles a monster, remove 1 counter from this card at the end of the Damage Step. If you cannot, destroy it. Once per turn, during your Main Phase, you can change 1 face up Attack Position monster your opponent controls to face up Defense