Illicit Auction [Mirage] SPA Demonio de planes siniestros You create a token that's

You create a token that's a copy of that creature

This explains why the goblins remain unaffected

Tezzeret Type: Land Uncommon Cost: {T}: Add {C}

you may have Hissing Iguanar deal 1 damage to target player or planeswalker

Illicit Auction [Mirage] SPA Demonio de planes siniestros You create a token that'sSet: Mirage Type: Sorcery Rare Cost: {3}{R}{R} Each player may bid life for control of target creature. You start the bidding with a bid of 0. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid and gains control of the creature. (This effect lasts indefinitely.)