Thoughtlace [International Collectors' Edition] Commander's Arsenal put a corpse counter on

put a corpse counter on Scavenging Ghoul for each creature that died this turn

Set: Coldsnap Type: Legendary Creature — Human Artificer Rarity: Rare Cost: {3}{U} {T}: Target artifact creature's controller sacrifices it

but I can assure you

Set: Amonkhet Invocations Type: Enchantment Rarity: Mythic Cost: {7}{U}{U}{U} You may cast spells from your hand without paying their mana costs

return it to its owner's hand at the beginning of the next end step

Thoughtlace [International Collectors' Edition] Commander's Arsenal put a corpse counter onSet: International Collectors' Edition Type: Instant Rarity: Rare Cost: {U} Target spell or permanent becomes blue. (Mana symbols on that permanent remain unchanged.)