First, lets take a look at the cards in the new cards that pay you off for having creatures with high power
Even though Elsa - Snow Queen can be found in The First Chapter card set, the D23 logo next to the rarity symbol makes this limited-edition card more valuable to fans

Eldrazi Tron (7.1% of the Winner's Metagame) 4 Eldrazi Temple 4 Urza's Mine 4 Urza's Power Plant 4 Urza's Tower 4 Kozilek's Command 4 Ugin, Eye of the Storms 4 Expedition Map 4 Ugin's Labyrinth 4 Devourer of Destiny 4 Karn, the Great Creator 4 Thought-Knot Seer 4 Mind Stone 3 Glaring Fleshraker 2 Dismember 1 Swamp 1 Vexing Bauble 1 Ulamog, the Ceaseless Hunger 1 Trinisphere 1 Sire of Seven Deaths 1 Snow-Covered Wastes 1 Chalice of the Void 2 Disruptor Flute 1 Trinisphere 1 Tormod's Crypt 1 Ensnaring Bridge 1 Liquimetal Coating 1 Cityscape Leveler 1 The Stone Brain 1 Torpor Orb 1 Walking Ballista 1 Extinguisher Battleship 1 The Filigree Sylex 1 Chalice of the Void 1 Skysovereign, Consul Flagship 1 Vexing Bauble Eldrazi Tron harnesses the iconic trio of Urza's Mine, Urza's Tower, and Urza's Power Plant to enable explosive openings
Urzas Contact Lenses Ive said it once, Ill say it again
While the Rainbow Rare is considered rarer due to being a Secret Rare, the coloring of the Full Art is so striking that is ends up edging out this version