silver tempest god booster box Build & Battle - SWSH12: Silver Tempest Shield—Silver Tempest expansion! Discover the Mystery of Silver

Crypt Ghast and Bubbling Muck for mana boosters

Defense of the Heart Whats that

In this phase, monsters can be summoned, effects can be activated, a monsters battle position can be manually changed, and spells and traps can be activated or set

Once your ready use cards like Massacre Wurm to target specific players and wipe out all their bird tokens

Id say its a snap include for black decks going forward

With almost two-thirds of the deck cycling for a single mana(!), it becomes inevitable that you will draw multiple copies of this absurdly large Lightning Helix, and at this point, its hard to argue that it needs to do anything else to dominate