Gemini Summoner

Level 4 WATER/Spellcaster Effect Monster
1500 ATK / 0 DEF

Once per turn, during your opponent's End Phase: You can pay 500 LP; Normal Summon/Set 1 Gemini monster from your hand or Normal Summon 1 face-up Gemini monster you control. The first time this card would be destroyed by battle each turn, it is not destroyed.

Rulings – Yugipedia

Printings:

Tactical Evolution Sneak Peek Participation Card: TAEV-ENSP1 (Super Rare) - 2007-08-04
Tactical Evolution: TAEV-EN000 (Secret Rare) - 2007-08-15
Warriors' Strike Structure Deck: SDWS-EN011 (Common) - 2009-10-23
Legendary Decks II: LDK2-ENJ17 (Common) - 2016-10-06

Prices:

Cardmarket: 0.02 €
TCGplayer: $ 0.06