Initially, Battle Angels of Tyrs ability to only draw you a card when attacking a player with more cards in hand than you may not appear all too strong
Abrupt Decay hits early threats like Rhystic Study or Mana Crypt, which you absolutely do not want to have your opponents benefit from
Don & Raph, Hard Science | 1 Colorless Mana, 2 Hybrid Blue/Red Mana Legendary Creature Mutant Ninja Turtle Menace Whenever Don & Raph attack, the next non-creature spell you cast this turn has affinity for artifacts
Rooms actually trigger eerie twice once when the first door is unlocked on the initial enter of the Room, and again when you unlock the final door
It's much harder to maximize X in a Constructed than it is in EDH
Another good EDH example is Isshin, Two Heavens as One, and in this case, youll want as many good attack triggers as possible