Charm of Shabti

Level 1 EARTH/Rock Effect
100 ATK / 100 DEF

During either player's turn: You can discard this card; until the End Phase, "Gravekeeper's" monsters you control cannot be destroyed by battle.

Rulings – Yugipedia

Printings:

Pharaonic Guardian: PGD-074 (Common) - 2003-07-18
Dark Revelation Volume 1: DR1-EN022 (Common) - 2005-03-19
Legendary Collection 3: Yugi's World Mega Pack: LCYW-EN190 (Common) - 2012-09-29

Prices:

Cardmarket: 0.21 €
TCGplayer: $ 0.11