Riddlemaster Sphinx

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.)

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

You may have this creature enter as a copy of a creature you control.