Trail of Mystery

The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, Deflecting Palm deals that much damage to that source's controller.

Target opponent exiles the top X cards of their library. You may cast any number of spells with mana value X or less from among them without paying their mana costs.

Choose one — • Destroy target monocolored creature. • Destroy target artifact or enchantment. • Draw two cards, then discard a card.

If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.

First strike, hexproof Whenever Narset attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

Whenever this creature attacks, target creature defending player controls blocks it this combat if able.

Flying Sacrifice another creature: This creature gains your choice of vigilance, lifelink, or haste until end of turn.

T: Add G, U, or R. Morph 2 (You may cast this card face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.) When this creature is turned face up, add GUR.