You will still have to pay the mana for the cost for every spree ability if you want to use the spell
Not only that, but Quilled Greatwurm grants this bonus to all your other creatures
You could try to have six different types and have one for each stage of their evolution, and at least four Energy types
In essence, you could exile a bunch of instants or sorceries from your hand to tee up a big flurry aimed at your opponent, while also getting access to more card draw with which to punish them
From 2005s EX: Delta Species set, it continues the trend of having so many cards on this list being the Star variants
Ive had Spellslinger decks in the past which focused more on Young Pyromancer styles of using spells to crank out a lot of tokens, so I pulled back on that here, using only four in total