Urza, Lord Protector

When this artifact enters, draw a card. 2: Add one mana of any color.

Prototype 1W — 2/2 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) Vigilance 1, T: Put a +1/+1 counter on target Assembly-Worker you control.

Mill five cards. You may put a permanent card from among the cards milled this way into your hand. (To mill a card, put the top card of your library into your graveyard.)

When this creature enters, mill three cards. You may put a land card from among the cards milled this way into your hand. If you don't, put a +1/+1 counter on this creature. (To mill a card, put the top card of your library into your graveyard.)

Flying When this creature enters, it deals 4 damage to any target. R: This creature gets +1/+0 until end of turn.

1: Until end of turn, this creature gets -1/-1 and gains your choice of flying, vigilance, deathtouch, or haste.

Exile all graveyards. Players can't cast noncreature spells this turn. Exile Calamity's Wake.

As long as you've drawn two or more cards this turn, this creature has deathtouch and lifelink.