Paleozoic Eldonia

Normal Trap Card

Target 1 face-up monster on the field; it gains 500 ATK/DEF until the end of this turn. Once per Chain, when a Trap Card is activated while this card is in your GY: You can Special Summon this card as a Normal Monster (Aqua/WATER/Level 2/ATK 1200/DEF 0). (This card is NOT treated as a Trap.) If Summoned this way, this card is unaffected by monster effects, also banish it when it leaves the field.

Rulings – Yugipedia

Printings:

Invasion: Vengeance: INOV-EN095 (Common) - 2016-11-03
2017 Mega-Tin Mega Pack: MP17-EN168 (Common) - 2017-08-24
OTS Tournament Pack 6: OP06-EN007 (Super Rare) - 2017-12-07
Speed Duel: Streets of Battle City: SBC1-ENC20 (Common) - 2023-08-24

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.11