Mystic of the Hidden Way can't be blocked.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
First strike, hexproof
Whenever Narset, Enlightened Master 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.
Delve (Each card you exile from your graveyard while casting this spell pays for .)
Flying
, , Exile X cards from your graveyard: Target creature gets -X/-X until end of turn.
Flash
This spell can't be countered.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Return three lands you control to their owner's hand: Return Pearl Lake Ancient to its owner's hand.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
Whenever Pine Walker or another creature you control is turned face up, untap that creature.
When Ponyback Brigade enters the battlefield or is turned face up, create three 1/1 red Goblin creature tokens.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
Whenever you cast a noncreature spell, you may pay . If you do, tap target creature an opponent controls and it doesn't untap during its controller's next untap step.
: Add , , or .
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Rattleclaw Mystic is turned face up, add .