Melffy Pony [ROTD-EN020] Common XY69 if an opponent's monster battles

if an opponent's monster battles a "Constellar" monster

Set: EX: Holon Phantoms Type: Basic Energy Rarity: Holo Rare

then shuffle your library

neither player can activate that monster's effects while this monster is face-up on the field

if you control no other monsters: You can send 2 face-up "Fire Formation" Spell/Trap Cards you control to the Graveyard

Melffy Pony [ROTD-EN020] Common XY69 if an opponent's monster battlesSet: Rise of the Duelist Card type: Effect Monster Rarity: Common Attack: 400 Defense: 0 If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can add 1 Level 2 or lower Beast monster from your GY to your hand, except "Melffy Pony". During your End Phase: You can Special Summon this card from your hand. You can