See Double [March of the Machine] Psychic Metal Remove one or more +1/+1

Remove one or more +1/+1 counters from Simic Manipulator: Gain control of target creature with power less than or equal to the number of +1/+1 counters removed this way

put a +1/+1 counter on Gavony Unhallowed

Set: Tenth Edition Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature

Set: Base Set Unlimited Type: Colorless Rarity: Holo Rare Retreat cost: Colorless

Then that player puts the rest into their graveyard

See Double [March of the Machine] Psychic Metal Remove one or more +1/+1Set: March of the Machine Type: Instant Rarity: Rare Cost: {2}{U}{U} This spell can't be copied. Choose one. If an opponent has eight or more cards in their graveyard, you may choose both. Copy target spell. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.) Create a token that's a copy of target creature.