Draconnet [SP18-EN006] Starfoil Rare Starfoil Rare your battling monster gains that

your battling monster gains that much ATK/DEF during that damage calculation only

You can only Special Summon this card from your Extra Deck by sending the above cards from either side of the field to the Graveyard

remove it from play

and is now in the GY or banished (except during the Damage Step): You can Special Summon this card from the GY (if it was there when that Spell/Trap left) or hand (even if not)

Draconnet [SP18-EN006] Starfoil Rare Starfoil Rare your battling monster gains thatSet: Star Pack VRAINS Card type: Effect Monster Rarity: Starfoil Rare Attack: 1400 Defense: 1200 When this card is Normal Summoned: You can Special Summon 1 Level 2 or lower Normal Monster from your hand or Deck in Defense Position.