This concept has been the backbone of a ton of aggro strategies for years
(You can t use more than 1 VSTAR Power in a game.) Arceus V Trinity Charge Put 2 darkness energy attached to this Pokemon into your hand
I do think one option that you have is replacing all signets with mana dorks like Birds of Paradise, Llanowar Elves, and Elvish Mystic If you are able to find more slots, I think you should consider: Hullbreaker Horror, Thryx, the Sudden Storm (dependent on count of spells with 5 cmc or more), Soothsaying, Mulldrifter, Beast Whisperer (dependent on final count of creatures), Rishkar's Expertise, Turntimber Symbiosis Flip , See the Unwritten, Balefire Dragon, Scourge of the Throne, Bane of Progress (I feel like you do not have a ton of high value artifacts or enchantments that would cause this to cripple you), Momir Vig, Simic Visionary, and Genesis Storm
Celebi Celebis Traverse Time attack could be a really solid pick for Grass box decks especially those running the powerful Mega Venusaur ex strategy