That's 10!

Continuous Spell

Each time a card or effect is activated, except "That's 10!": You can place 1 Access Counter on this card (max. 10). Monsters you control gain 100 ATK for each Access Counter on this card. If the 10th Access Counter is placed on this card: You can return this card to the hand, and if you do, Set from your Deck, 1 Continuous Trap with an effect that Special Summons itself as a monster. It can be activated this turn.

Rulings – Yugipedia

Printings:

The Infinite Forbidden: INFO-EN067 (Common) - 2024-07-18

Prices:

Cardmarket: 0.03 €
TCGplayer: $ 0.14