mtg search your library for a legendary card Momir Vig, Simic Visionary [Dissension] Rules Text: Search, library, Supertype:

There are plenty of existing archetypes which naturally build a high storm count just by chaining together cheap permanents, be those elves, equipment, or expendable bauble style artifacts

Also, casting a spell with flashback doesn't change its mana value

Youll want to pick this up while its cheap, because itll be played until the end of time in Legacy and Modern lists

Marrow-Gnawer is the archetypes beating heart: all your Rats gain fear (nearly unblockable), and you can tap-and-sacrifice a single Rat to create X tokens equal to the number of Rats you control

The other nice thing is that some sellers will even pack the set precons together at a discount