Trinisphere taxes their cheap interaction and cheap artifact spells, disrupting the ramp/prison shell while we apply pressure. Damping Sphere caps mana produced from tapping lands like Urza's Tower and Urza's Mine for multiple mana, slowing their acceleration into Ugin or Karn. Karakas is weaker here since they run no legendary creature threats to bounce. Archon of Emeria remains crucial, forcing their nonbasic lands to enter tapped and limiting them to one spell per turn against a deck full of card draw and ramp spells.