mtg commander hydra deck Magic: The Gathering: The Strongest Cards For a Tribal Hydra Tribal // Commander (Progenitus)

Kroxa works quite well with other discard and aristocrat effects, so if this giant is your commander, load up on cards that take advantage of these effects

Getting another card that doubles them on a card that can easily slot into any deck featuring blue only adds to the archetype

Have you thought about what happens when you cast Self-Destruct on Screaming Nemesis

That's a tough question

While these three archetypes do have plenty of overlap, its easy to build distinct decks supporting each theme

Unless youre in possession of an obviously rare and desirable card, the amount of money you spend shipping a card and having it graded is rarely going to be worth the amount youll sell that card for on the secondary market