Gateway to Chaos

Field Spell

When this card is activated: Add 1 "Black Luster Soldier" Ritual Monster or 1 "Gaia The Fierce Knight" monster from your Deck to your hand. Each time a Monster Card(s) is sent from the hand or field to the GY, place 1 Spell Counter on this card for each of those cards (max. 6). Once per turn: You can remove 3 Spell Counters from this card; add 1 Ritual Spell from your Deck to your hand. You can only activate 1 "Gateway to Chaos" per turn.

Rulings – Yugipedia

Printings:

Dimension of Chaos: DOCS-EN057 (Super Rare) - 2015-11-05
Shadows in Valhalla: SHVA-EN058 (Secret Rare) - 2018-08-16

Prices:

Cardmarket: 2.89 €
TCGplayer: $ 1.92