Ouroboroid

If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Warp 1U (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)

Whenever an artifact you control enters, put a loyalty counter on Tezzeret. 0: Untap target artifact or creature. If it's an artifact creature, put a +1/+1 counter on it. −3: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle. −7: You get an emblem with "At the beginning of combat on your turn, put three +1/+1 counters on target artifact you control. If it's not a creature, it becomes a 0/0 Robot artifact creature."

Ward—Discard a card at random. Void — Whenever Alpharael attacks, if a nonland permanent left the battlefield this turn or a spell was warped this turn, defending player loses half their life, rounded up.

This creature gets +X/+0, where X is the greatest mana value among other artifacts you control.

Vigilance When this creature enters, each opponent exiles a card from their hand and may play that card for as long as it remains exiled. Each spell cast this way costs 1 more to cast. Each land played this way enters tapped.

Cosmogoyf's power is equal to the number of cards you own in exile and its toughness is equal to that number plus 1.

Menace 2, T, Exile an artifact card from your graveyard: Put a +1/+1 counter on this creature, then it deals damage equal to its power to any target.

When The Seriema enters, search your library for a legendary creature card, reveal it, put it into your hand, then shuffle. Station (Tap another creature you control: Put charge counters equal to its power on this Spacecraft. Station only as a sorcery. It's an artifact creature at 7+.) 7+ | Flying Other tapped legendary creatures you control have indestructible.