Breach the Multiverse (Extended Art) [March of the Machine] Servo Splitter of Seconds deals combat

Splitter of Seconds deals combat damage to a player

Set: Phyrexia: All Will Be One Prerelease Promos Type: Artifact Rarity: Rare Cost: {2}{G}{G} You may play lands from your graveyard

Set: Outlaws of Thunder Junction: The Big Score Type: Creature — Human Rogue Rarity: Mythic Cost: {1}{R} Menace

But it will not halt them long

If it's a main phase

Breach the Multiverse (Extended Art) [March of the Machine] Servo Splitter of Seconds deals combatSet: March of the Machine Type: Sorcery Rarity: Rare Cost: {5}{B}{B} Each player mills ten cards. For each player, choose a creature or planeswalker card in that player's graveyard. Put those cards onto the battlefield under your control. Then each creature you control becomes a Phyrexian in addition to its other types.