Replication Technique is a rare Sorcery card from Modern Horizons 3 Commander (M3C), collector number 192. Current market price: $0.22, TCGplayer market prices via Scryfall.
Demonstrate (When you cast this spell, you may copy it. If you do, choose an opponent to also copy it. Players may choose new targets for their copies.) Create a token that's a copy of target permanent you control.