Send bosses at your rival in 1v1 ranked

A live 1v1 match on a split screen. Monsters you kill cross to your rival's board, and this season you can send bosses too. Every 5th wave, pick one of three: the Shapeshifter rewrites enemy towers, the Destroyer Lord smashes up to four, and the Herald of Frenzy speeds that side's monsters by 25%. Gear and heroes are normalised to level 1, so it comes down to judgement, not account age. Climb seven leagues from Bronze to Challenger, and score rewards reset with the new season.