Progenitor Exarch

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When this Siege enters, choose one or both — • Destroy all legendary creatures. • Destroy all nonlegendary creatures.

Trample, haste 2R: This creature gets +2/+0 until end of turn. Whenever this creature deals combat damage to an opponent, it deals that much damage to target planeswalker that player controls or battle that player protects.

Whenever you draw your second card each turn, target opponent loses 2 life and you gain 2 life. T, Sacrifice another creature: Draw a card. You may put a land card from your hand onto the battlefield tapped. If you control eight or more lands, repeat this process once.

Whenever a creature you control enters, draw a card if its power is 3 or greater. Otherwise, put two +1/+1 counters on it.

Flying When Hidetsugu and Kairi enters, draw three cards, then put two cards from your hand on top of your library in any order. When Hidetsugu and Kairi dies, exile the top card of your library. Target opponent loses life equal to its mana value. If it's an instant or sorcery card, you may cast it without paying its mana cost.

Sacrifice another Phyrexian: Put a +1/+1 counter on this creature. When this creature dies, incubate X, where X is its power. (Create an Incubator token with X +1/+1 counters on it and "2: Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)

Whenever you cast a legendary spell, untap Rona. T: Draw a card, then discard a card. 5B/P: Transform Rona. Activate only as a sorcery. (B/P can be paid with either B or 2 life.)