Ainok Tracker Akoum Hellhound Arcbound Tracker Ashmouth Hound Blazing Hellhound Blood Hound Bolt Hound Carnival Barker Chandra's Magmutt Deer-Dog Dogmeat, Ever Loyal Edgewall Pack Enduring Courage Equilibrium Adept Fiery Hellhound Goldhound Hellfire Mongrel Hound of Griselbrand Igneous Cur Karplusan Hound Komainu Battle Armor Kroxa and Kunoros Lava Hounds Lightning Hounds Mad Dog Mogis's Warhound Monstrous Hound Pack Mastiff Pako, Arcane Retriever Pyre Hound Rakdos Ragemutt Rin and Seri, Inseparable Scrapyard Mongrel Slumbering Cerberus Summon: G.F
That is, it doesn't matter how long it's been a creature, just how long it's been on the battlefield
Dryad Arbor seems to need its own column
Energy budgets can be tight, but the Izzet Generatorium also helps out by providing an extra energy counter every time you gain energy
Conflux ability Creatures - I didn't include any of the creatures in the Dragonsoul Knight cycle because they don't take advantage of any of the multicolored synergy or Ramos
Oh, and he also makes for a neat Commander deck