During the Main Phase: Target 1 "Drytron" monster or 1 Ritual Monster you control, and 1 face-up monster your opponent controls; your monster loses exactly 1000 ATK until the end of your opponent's turn, and if it does, destroy that opponent's monster. You can only activate 1 "Drytron Asterism" per turn.
Target 1 "Drytron" monster in your GY; add it to your hand. During your Main Phase, except the turn this card was sent to the GY: You can banish this card from your GY, then target 1 "Drytron" monster you control; it gains 2000 ATK until the end of your opponent's turn. You can only use each effect of "Drytron Eclipse" once per turn.
When this card is activated: You can add 1 "Drytron" Spell/Trap from your Deck to your hand, except "Drytron Fafnir". The activation and the activated effects of Ritual Spell Cards cannot be negated. Once per turn, if a monster is Normal or Special Summoned face-up while you control a "Drytron" monster (except during the Damage Step): You can reduce that monster's Level by 1 per 1000 of its current ATK (min. Level 1) for the rest of this turn. You can only activate 1 "Drytron Fafnir" per turn.
When your opponent Normal or Special Summons a monster(s), while you control a Ritual Monster: Negate the Summon, and if you do, shuffle that monster into the Deck. You can only activate 1 "Drytron Meteor Shower" per turn.
Special Summon 1 "Drytron" monster from your Deck, but destroy it during the End Phase. You can only activate 1 "Drytron Nova" per turn. You cannot Special Summon monsters, except monsters that cannot be Normal Summoned/Set, the turn you activate this card.
This card can be used to Ritual Summon any Ritual Monster from your hand or GY. You must also Tribute Machine monsters from your hand or field whose total ATK equal or exceed the ATK of the Ritual Monster you Ritual Summon. If this card is in your GY: You can target 1 "Drytron" monster you control; it loses exactly 1000 ATK until the end of your opponent's turn, and if it does, add this card to your hand. You can only use this effect of "Meteonis Drytron" once per turn.
If a "Drytron" card(s) is banished (except during the Damage Step): You can Tribute 1 "Drytron" monster, then target up to 2 of your banished "Drytron" cards; add them to your hand. You can reveal 1 "Meteonis Drytron" in your hand; Ritual Summon 1 Machine Ritual Monster from your hand or GY, by Tributing Machine monsters from your hand or field whose total ATK equals or exceeds its ATK. You can only use each effect of "Meteoroa Drytron" once per turn.
Special Summon 1 "Ultimate Flagship Ursatron" from your Extra Deck by banishing 1 "Ursarctic Big Dipper" and 1 "Drytron Fafnir" from your hand and/or field, although you can banish 1 of them from your Deck instead if "Ursarctic Polari" or "Drytron Alpha Thuban" is on the field. If you would Tribute a monster(s) to activate an "Ursarctic" or "Drytron" monster's effect, you can banish this card from your GY instead. You can only use this effect of "Ursarctic Drytron" once per turn.