World Legacy -

World Legacy - "World Key"

Level 1 DARK/Machine Effect
0 ATK / 0 DEF

You can discard 1 "World Legacy" card; you can Tribute Summon 1 monster during your Main Phase this turn, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) At the start of the Damage Step, if this card battles an opponent's Link Monster: You can return that monster to the Extra Deck. You can only use each effect of "World Legacy - "World Key"" once per turn.

Rulings – Yugipedia

Printings:

Chaos Impact: CHIM-EN021 (Common) - 2019-10-24

Prices:

Cardmarket: 0.02 €
TCGplayer: $ 0.08