arceus pokemon card mega gx XY116 - Holofoil XY Promos Pokémon Hit Points280 HP Form Mega Arceus - justlook

Guide of Souls also serves as huge energy ramp in an aggro deck

Thassa, God of the Sea has value as a cheap big creature with decent abilities, but I dont think it even comes close to how good Thassa, Deep-Dwelling can be

This deck contains: 1 60-card starter deck including 2 foil cards 11 Tokens 1 Rulebook 1 Booster pack containing 12 randomized cards Decklist Amber & Emerald 2x Akela Forest Runner 2x Bagheera Cautious Explorer 1x Baloo Carefree Bear 3x Baloo Laid-Back Bear 2x Bellwether Master Manipulator 3x Big Nose Lovesick Poet 2x Della Duck Returning Mother 1x Emily Quackfaster Level-Headed Librarian 3x Eilonwy Princess of Llyr 3x Flotsam Slippery as an Eel 3x Flynn Rider Spectral Scoundrel 3x Gaston Frightful Bully 2x Goofy Ghost Hunter 3x Higgins Undercover Officer 2x Hook Hand Unexpectedly Friendly 2x Jetsam Opportunistic Eel 1x Megara Secret Keeper 3x Mrs

Sacrifice as an activation cost is a way to increase a spells cost without having it cost additional mana

So it might not cost us much to theme this list but what are the gains for doing so