Disregarding the current card, my theory is that because the best case is worse than a storm card, the base case can be better, so it should allow cards to be played outside dedicated storm decks.
This card is a bit weak though, perhaps
yah white tokens could work. How about:
I suck at naming cards.tokenmaker - {W}
Sorcery
Put a 1/1 white human token onto the battlefield.
If you cast at least one spell before this one this turn, put two 1/1 white human tokens onto the battlefield instead.
Hammer - {1}{R}
Sorcery
~ deals 3 damage to target creature or player.
If you cast one or more spells before ~ this turn, draw a card.
Hammer - {1}{R}
Sorcery
~ deals 3 damage to target creature or player.
If you cast one or more spells before ~ this turn, deal 4 damage to target creature or...