You can only control 1 face-up "Trial of Grace"
Typical configurations include: Booster Box: 36 packs, MSRP around $144 Elite Trainer Box: 9-11 packs plus accessories, MSRP $55-60 Build & Battle Box: 4 packs plus 40-card deck and promo, MSRP $20-25 Pokmon Center Elite Trainer Box: enhanced sleeves and promo, higher MSRP Print-run tiers favor hobby channels for better parallel quality
To help you summon it, use Sky Cavalry Centaurea to battle an opponent's monster, taking advantage of its effect that doesn't let it be destroyed in battle, then Special Summon Downerd Magician to increase the number of materials for your next summon, which will be ZEUS
this would make it at least somewhat easier to activate the damage boost while still matching the theme of the attack
It can also do this if it's sent to the Graveyard as a Fusion Material, with the bonus that it can also fetch a face-up Lunalight Pendulum Monster from the Extra Deck
Celebi allows you to search your deck for any two Pokemon and add them to your hand with a move that costs only one Grass energy