Poliwhirl (38/102) [Base Set Shadowless Unlimited] BT8-011 then you can Special Summon

then you can Special Summon it if it is a "Star Seraph" monster

your opponent places 1 card from their hand on either the top or bottom of the Deck

during damage calculation: The equipped monster's ATK and DEF become equal to the ATK or DEF (whichever is higher) of the opponent's battling monster +100

or if this card in your possession is destroyed by an opponent's card effect and sent to your Graveyard: You can Special Summon 1 "Gaia The Fierce Knight" monster from your hand

Poliwhirl (38/102) [Base Set Shadowless Unlimited] BT8-011 then you can Special SummonSet: Base Set Shadowless Unlimited Type: Water Rarity: Uncommon Retreat cost: Colorless