Hall of Storm Giants is the least exciting Cube option by a country mile, but the low opportunity cost does make all five cards worth considering
Instant and sorcery cards are used to create one-time effects, while other cards, known as permanents , remain in play until they are removed
The Unbeatable Squirrel Girl The Unbeatable Squirrel Girl gets widespread recognition as the green Krenko, Mob Boss, except that with the sheer amount of mana available to green, the absence of a on the girl's token making activated ability gives it a much higher ceiling
Modern Horizons 3 also has serialized cards, which can be difficult to track so we left them off here
Creating three tokens for 3 mana is going to be good and will trigger a lot of the other cards in your deck nicely
In the color of ramp, this is likely a better home for the Grave Titan, and that's a card that's run in 16,739 decks over at EDHREC.com