Deck Primer / Description

Play Gale, Waterdeep Prodigy and then just play instants/sorceries from your hand and graveyard.
There are plenty of interactions that can help you survive until you find something that will deal dmg to your opponents (Curiosity one something like Guttersnipe is obviously OP) or create tokens as you are playing your spells.

Lategame the Dragon Cultist can start making tokens - you just need one card that damages opponents on playing instant or sorceries. Then playing two, which translates usually to 6 dmg, is easy -> you get dragon token.

The deck is pretty slow. It has quite few interactive cards and can cast most of them them twice, so it should not fall prey to more agressive decks super easily. Just don't be afrait to use your spells agressively as you usully have tons of them.

Overall the deck is not really strong. Gale's ability where you must alter between casting instant and sorceries from hand is a bit weird and the Dragon Cultist is actually very slow and conditional value (e.g. Tavern Brawler would be much faster value). Still it is a fun deck to play and can do its thing in a mid-power casual for times where you don't want to be the one who becomes a threat quickly.