Target 1 of your banished "Crystron" monsters; Special Summon it, and if you do, if your opponent controls any face-up monsters, change their DEF to 0. During either player's turn, except the turn this card was sent to the Graveyard, when a card or effect is activated that targets a "Crystron" monster you control: You can banish this card from your Graveyard; negate that effect.
Protects a Crystron monster from a targeting effect.
Reducing opponent’s defense is not that useful when they’re all in attack position.
Revive a Crystron Tuner monster which will then Special Summon another Crystron monster and perform a Synchro Summon during your opponent’s turn. Summon Crystron Ametrix to take advantage of the defense debuff. The Crystron non-Tuners also have effects that banish themselves from the graveyard so Crystron Impact can be used to recycle them.