Horn of Valhalla will be at its best in Cubes that tend to generate battlefield stalls
Prowess with haste is awfully good, and just when you run out of gas, you can drop this and flip it for a total of 4 mana in the right deck, and draw three cards
Its not possible to cast both sides at once, so this is the default case
The card you've been searching for is right here, ready to join your ranks and champion your cause
If you don't hold any friends for Ghalta, then Griselbrand or Atraxa, Grand Unifier lets you sculpt your hand while adding an enormous flying lifelinker to the battlefield
It gives you a look at your opponent's hand, which lets you know if it's safe to go all-in on your combo, a line of play that was especially important to the Infect deck at the top of the format a year ago