Mahaama the Fairy Dragon

Level 5 LIGHT/Dragon Tuner Effect
0 ATK / 2500 DEF

During your opponent's turn, when either player takes battle damage: You can Special Summon this card from your hand, then apply 1 of these effects.
● Gain LP equal to that battle damage.
● Inflict damage to your opponent equal to that battle damage.

Rulings – Yugipedia

Printings:

Phantom Rage: PHRA-EN081 (Common) - 2020-11-05
OTS Tournament Pack 15: OP15-EN025 (Common) - 2021-02-17
OTS Tournament Pack 15 (POR): OP15-PT025 (Common) - 2021-02-18
2021 Tin of Ancient Battles: MP21-EN218 (Ultra Rare) - 2021-09-30

Prices:

Cardmarket: 0.05 €
TCGplayer: $ 0.13