Enchantment Royal Decree Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, this enchantment deals 1 damage to that permanent's controller
Armored Skyhunter grabs an aura or equipment from among the top six cards in your library, puts it on the field, and attaches it to a creature for free
If it's not your turn and you gain control of a creature with a boast ability after that creature attacked, you can activate that creature's boast ability if it hasn't been activated yet that turn
A short list can't cover everything but here is the gist of how you play
Extra Cards
That shuts down things like Force of Will or Fierce Guardianship, pretty commonly played in Commander