While you can go the route of casting one big spell to maximize Grahas payoff, its equally viable to trigger Grahas ability on every turn, including your opponents
If you or someone can validate, I will get them added for sure
Creatures (25) 4 Ranger of Eos 4 Wild Nacatl 4 Woolly Thoctar 4 Noble Hierarch 4 Bloodbraid Elf 4 Baneslayer Angel 1 Scute Mob Planeswalkers (3) Lands (24) Spells (8) Sideboard #17: Berserk Berserk is a true classic, appearing on the literal first Restricted List in Magic, all the way back in January 1994, when the game was barely six months old (and during a time where there were approximately as many players worldwide as there are in California today)
SR Super Rare Rikka Konkon X SPELL Field If you control a "Rikka" monster: You can Set 1 "Rikka" Spell/Trap directly from your Deck to your Spell & Trap Zone, also you cannot Special Summon monsters for the rest of this turn, except Plant monsters
Non-Japanese Play Boosters and 66.6% of Japanese Play Boosters contain at least 1 non-foil Mystical Archive card
Everything , from your lands to your hexproof creatures, goes right down the drain as the heavens collapse