These like most custom sizes are cut down from parent sheets
The manabase here is okay, but the deck is missing a couple of obvious enchantments that would have fed into the game plan and helped with the mana like Utopia Sprawl
Removal and Land Destruction Youre somewhat limited in the type of removal you can have in a mono green deck because green mostly features artifact or enchantment removal like Nature's Claim and Boseiju, Who Endures
Dark Magician Girl is a fan-favorite, often paired with Dark Magician support cards for enhanced combos
Sky Judgment can unleash a massive 190 damage, though will cause this black dragon to discard 3 energies, so this move should only be used when one has an excessive amount of energy cards or as a finale to knock out a particularly deadly foe
Clerics and vampires are all about lifegain, so Vito, Thorn of the Dusk Roses ability triggers often regardless