Purple Poison Magician

Level 4 DARK/Spellcaster Pendulum Effect
1200 ATK / 2100 DEF

[ Pendulum Effect ]
Once per turn, if your DARK Spellcaster-Type monster battles, before damage calculation: You can activate this effect; that monster gains 1200 ATK (until the end of the Damage Step), then destroy this card.

[ Monster Effect ]

(This card is always treated as a "Fusion Dragon" card.)
If this card is destroyed by battle or card effect: You can target 1 face-up card on the field; destroy it.

Rulings – Yugipedia

Printings:

Pendulum Evolution: PEVO-EN006 (Ultra Rare) - 2017-06-22

Prices:

Cardmarket: 0.54 €
TCGplayer: $ 1.21