This means that earlier in the game, you might not have to rely as much on your goad mechanics to get players to go after someone besides you, since theyll likely want that extra card
Plenty of collectors flocked to Phantasmal Flames when they heard about cards like Mega Charizard X ex and Mega Gengar ex
Filter Lands These can be a little awkward if used in large numbers or with other awkward mana sources and loads of colourless lands etc however in singleton format that is rarely an issue
Then theres Cogsworth, who becomes stronger if theres just one item in the discard
Since most players include more artifact removal than land removal, this not only provides you with a safer mana base, it also thins your deck, allowing you to draw fewer lands and more spells throughout the game
As for a2-7-yanmega-ex, Air Slash deals 120 damage but will discard an Energy, so you're forced to attach another Energy if you want to attack with it again