All Shining Pokemon are classified as being in the basic stage, so they can be played immediately without needing to evolve them or meet any other criteria
This is because Commander has changed, while the spirit of the format really hasnt
I know Im slamming it into my Henzie deck, and I think its a good pickup for Disa as well, cos giving Tarmogoyfs trample is key to triggering Disa to get more value
First it immediately replaces itself drawing a card, gaining 4 puts you out of reach of Lava Spike (Omnath, Locus of Creation + Fetch Land is usually concession from Burn decks)
Ghitu Lavarunner hits early as a 2/2 usually on turn two if you cast a one-drop spell on turn-1 and turn-2
So, what made me separate Lugia GX Rainbow Rare from the other twelve Rainbow Rares of the set