Hedron Detonator (118) [March of the Machine Commander] [Extended Art] Grading:Slightly Played except it has "When this

except it has "When this creature enters

Set: Darksteel Type: Artifact Creature — Beast Rarity: rare Cost: {2} Sacrifice an artifact: Put a +1/+1 counter on this creature

Set: Secret Lair Drop Type: Creature — Elf Druid Rarity: rare Cost: {1}{G} {T}: For each color among permanents you control

Set: Dominaria Type: Land Rarity: rare {T}: Add {C}

000 Commander Type: Creature — Human Shapeshifter Assassin Rarity: rare Cost: {4}{U}{B} Flash Polymorphine — You may have this creature enter tapped as a copy of any creature on the battlefield

Hedron Detonator (118) [March of the Machine Commander] [Extended Art] Grading:Slightly Played except it has "When thisSet: March of the Machine Commander Type: Creature Goblin Artificer Rarity: rare Cost: {2}{R} Whenever an artifact you control enters, this creature deals 1 damage to target opponent. {T}, Sacrifice two artifacts: Exile the top card of your library. You may play that card this turn.