I say this because Rainbow Spear uses too many energy cards too quickly so it isn't that useful, and you can't stack up energy cards on Xerneas because Rainbow Spear discards everything
Its heavily played in 3- to 4-color decks, while it allows for easier splashes for activated abilities and off-color flashback or kicker costs
Simply activate Kwain on an opponents turn and you might draw an extra card or else discourage that player from choosing to draw
Just like the Brilliant Stars Arceus VSTAR, Dragonite has 280 HP and an attack that can deal 250 damage
Ed, Hysterical Partygoer can prevent all damaged character from challenging that can be extremely useful if you are facing decks with powerful Characters like Maui, Hero for All
Its an artifact, with a simple cost, and a simple ability, that is right for its color