Welder Automaton

(T: Add R.)

Each opponent loses 1 life for each creature you control.

All creatures get -4/-4 until end of turn.

(T: Add B.)

Flying, lifelink When this creature enters, create a number of 2/2 white Knight creature tokens with vigilance equal to the number of opponents you attacked this turn.

Flying When this creature enters, draw cards equal to the number of opponents you have. 3U: Create a 1/1 colorless Thopter artifact creature token with flying.

Menace When this creature enters, return up to X target Zombie cards from your graveyard to the battlefield, where X is the number of opponents you have.

When this creature enters, create a number of 1/1 red Goblin creature tokens equal to the number of opponents you have. 3R, T: If a source you control would deal damage to an opponent this turn, it deals double that damage to that player instead.