survival mtg cards of the Fittest | Proxy Card — choose Your Frame! 98 nonfoil cards) Survival, 6 cards | Magic:

Sunblade Elf has good stats

Flaring Pain is one thats pretty nice to have if your local groups are wise to your aggro style

I fully agree on not putting Sol Ring in this precon by the way - you have 133 pips to fix for in this deck and Sol Ring tapping for double colorless will not help in making you cast the large number of 5-color cards anytime soon, but if there was ever a time to reprint Birds of Paradise into a precon it should have been this one

Combined with this great Rakdos commanders activated ability, youre essentially also getting generic mana on top of whatever benefit you paid for with cards like Bolas's Citadel or Necropotence