Simply fill a deck with lower-cost instant sorceries, and flying creatures, then cast away and watch Balmor and all other creatures on the board get huge and smash through any opponent's defense
While I know basically nothing about the characters I really like the showcase frames which all feature specific characters from across the games
7 Trailtracker Scout Never Leave Anything Behind Creature Raccoon Scout Tap: Add one mana of any color
The casting cost isn't all that helpful unless you are after devotion, otherwise it just harms you ability to play colourless lands
When Sheoldred hits the battlefield, it forces each of your opponents to sacrifice a non-token creature or planeswalker, all but guaranteeing you get a good card off the board
Mechanics like convoke, bloodthirst, and surveil debuted in Ravnica sets, so its a safe bet that bloodrush can return to a Standard set someday, hopefully with a little more oomph