No other card in Magic does what Dread Return does, and it's considered to be so broken that Wizards put it on the initial Modern ban list, where it remains to this day
The deck may be a bit of a glass cannon, even if it aims to play for the long game, but I think its fair to say that Gavi can be built in any number of ways, including dedicating an even higher ratio of the deck to cycling
Ideally, you want an Enchantress in play by turn two, and Wild Growth and Utopia Sprawl help with that
You can even activate it multiple times
The First Turtle-Beast Level 4 WATER Reptile ATK 0/DEF 2100 You can Special Summon this card from your hand if your opponent Special Summoned a monster on their previous turn
This is subtle, so use it as a supporting clue, not your only test