One of the leaders of Hydra being able to fill the board with Villains at will makes a lot of sense, and she figures to be a sneakily powerful card if left unchecked
When And the Band Played On is activated, neither player can special summon monsters with the same level or rank as monsters they already control
The versatility of Withering Torment makes sure that you wont get stuck with it in your hand, but if youre just looking for creature removal, there are better options out there
Lightsworn Monsters are blessed with incredible effects, high ATK/DEF, or both
Some creatures will make other creatures power and toughness go up, some can draw you cards, while others can create tokens
Volcanic Spite and Fire Prophecy are great for the same reason Nahiris Warcrafting is great