Miles powers up others and then transforms into a camouflaging web-slinger with first strike and haste
You could probably beat some mono-white pile with Sanctifier since none of their other cards matter, but the fact it just shows up as the cherry on top of one of the best decks in the format that already presents a ton of other issues and can freely recast Sanctifier off Lurrus of the Dream-Den is a bit too much to handle
Use these self-damaging cards, alongside powerful creatures like Archon of Cruelty or Hullbreaker Horror who can either be cast for free using Rona, Tolarian Obliterators effect, or discarded and reanimated after being dumped into the graveyard by Rona, Herald of Invasion
Other corrupted abilities, indicated by the word "instead" provide alternative effects that happen instead of the base effect
At the beginning of each opponent's end step, Keeper of the Accord checks for how many creatures and land cards the opponent controls