all hydra cards mtg Top 10 Hydras in Magic: The Gathering The Gathering Hooded Hydra (MKC-171) - Murders

Each landfall trigger gives you a 5/5 elemental, and when any elemental dies, you get to bolt something

Sacrifice is a very common way to tie these three colors together in Cube, though, and there are some nice cards here for Cubes of assorted sub-themes and power levels

The monarch is a sort of player ability that any one player at the table can gain

Kadena is quite powerful too, gifting you a free morph spell each turn and giving you card advantage whenever you turn your creatures face-up

Then add Avatar of Slaughter for pretty hefty damage

If Esper or Dimir Control is a deck I think you'll just be including this card, even if it's just one copy in your maindeck