Subgoyf

Master of Etherium's power and toughness are each equal to the number of artifacts you control.

Other artifact creatures you control get +1/+1.

, : Any number of target players each mill two cards. (Each of them puts the top two cards of their library into their graveyard.)

Exhaust — , : Any number of target players each mill cards equal to the number of cards in their graveyard. (Activate each exhaust ability only once.)

Enchant artifact

Enchanted artifact is a creature with base power and toughness 5/5 in addition to its other types.

Flash

Enchant creature

When this Aura enters, each player mills two cards.

Enchanted creature gets -X/-0, where X is the number of cards in its controller's graveyard.

When this creature enters, each opponent mills three cards.

Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, that player mills three cards.

: Until end of turn, Thopters you control have base power and toughness X/X, where X is the number of cards in your hand.

, : Draw a card, then discard a card. If the discarded card was an artifact card, exile it from your graveyard. If you do, create a token that's a copy of it, except it's a 0/2 Thopter artifact creature with flying in addition to its other types.