It draws multiple cards over the course of the game, accelerates you on lands, and even gains you some life
Black has access to nifty discard effects ([c]Thoughtseize[/c], [c]Inquisition of Kozilek[/c], [c]Hymn to Tourach[/c]) which are especially good at disassembling combos from combo decks
Mega Camerupt ex can deliver a ludicrous 240 damage for one Energy if the opponent is Burned, while my favorite, Mega Mawile, can take a Huge Bite of 260 damage if an opponent is unharmed (and only 30 if it isnt!), but also Gobble Down for 80 per prize card youve taken
This is also the final expansion in the Scarlet and Violet era, and I can tell the designers knew it
10 - 200 Cards inc Holos/Rares
There are no blue creatures with reach on account of they just have access to flying