Back home, he’s an extremely powerful sorcerer. Here, Strange will find that his magic comes to him with more difficulty and many of his spells no longer work. The ones that did persist into Thedas:

• Shields: Conjuring protective glowing handheld shields, which can block and deflect attacks both physical and magical. Can be one very large shield, or two smaller ones. The larger version is about the size of a warrior’s tower shield, so can protect himself and one other person if they’re sheltering behind him; can only be maintained consistently for 15 minutes. (Comparable to Spell Shield.)
  
  
• Eldritch weapons: Conjuring glowing weaponry for offensive attacks. Shapes can vary like a whip, sword, buzzsaw, or ropes/restraints. The weapons will burn on touch like they’re a flaming sword, although at Strange’s choice, the ropes can be made safe-to-touch. All of these can last about 30 minutes before his energy is drained and they have to dissipate. (Comparable to Spirit Blade.)
  
  
• Energy blasts: Strange can project energy blasts, streams, and bolts of fiery energy to harm an enemy (or light a campfire, heyo). Limited to line of sight. (Comparable to Spirit Bolt.)
  
  
• Telekinesis: A wave of telekinetic force which can hurtle someone away like a powerful shove, or throw a book, or move a chair, or pull something closer to him. Limited to line of sight, and can’t move anything larger or heavier than a druffalo. No longer has the fine-motor control which he used to exhibit back home. (Comparable to Telekinetic Burst.)
  
  
• Astral projection: Formerly, Strange used to be able to separate his spirit (or someone else’s) from the body and visit the astral plane in order to communicate while unconscious, read while sleeping, battle someone else’s spirit, etc. Here, he’ll instead find that he can eventually meditate to enter the Fade like a Dreamer and remain conscious and lucid throughout. This will require time and training to access.