Like many people I spoke to at Gen Con before playing the game myself, I think the game is clearly outpaced by the collectible nature of the productthe packaging, the card stock, and the exceptional artwork is meant to be collected, sleeved, and maybe only occasionally played
Others need to ramp really, really hard, like my Vaevictis Asmadi, the Dire deck, which runs 40 Lands and 20 ramp spells, for a total of 60 mana sources
Thrasios, Triton Hero often chills in the command zone until you have infinite mana to feed into its activated ability so you can draw your deck and win with Thassa's Oracle, but you can also exploit the activated ability with cards like Training Grounds and Seedborn Muse
Blue Donatello, Gadget Master | 2 Colorless Mana, 1 Blue Mana Legendary Creature Mutant Ninja Turtle Sneak 1 Colorless Mana, 1 Blue Mana (You may cast this spell for 1 Colorless Mana, 1 Blue Mana if you also return an unblocked attacker you control to hand during the declare blockers step