Lair of the Hydra Everything that I like about Den of the Bugbear is true of Lair of the Hydra, except that green decks will more commonly be interested in activating the card by their nature in the classic Cube environments
The extra life trigger gives you a small, but welcome, life buffer that adds up over a long game
Aside from my very niche issues with the decks lore, the theme of monarch and human typal make perfect sense and are integrated seamlessly into the playability
The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.
Another creature that cares about evens or odds, Kianne, Corrupted Memory offers flash-speed casting to creatures when she has an odd power number, and flash casting to non-creature spells when she has even power
You can only have so many cards in your deck, though, so its important to include ways to make extra Goblins