Omniscience

Take an extra turn after this one. If Nexus of Fate would be put into a graveyard from anywhere, reveal Nexus of Fate and shuffle it into its owner's library instead.

This land enters tapped. T: Add W or U.

Whenever this creature attacks, create two 1/1 white Cat creature tokens with lifelink that are tapped and attacking.

Exile target permanent with mana value 1.

Sarkhan's Dragonfire deals 3 damage to any target. Look at the top five cards of your library. You may reveal a red card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

(T: Add B.)

Flying (This creature can't be blocked except by creatures with flying or reach.) When this creature enters, you may return target creature an opponent controls to its owner's hand.

Target creature gets +4/+4 until end of turn.