Trapped!

Spell Properties
The AoE of the trap is a circular ring of 1 cell at all levels. 

Spell Characteristics
Trap effect: Damage: 3~7 Switch the position of 2 players || Sets a grade 1 trap Trap effect: Damage: 3~7 Switch the position of 2 players || 6 || 2-3 || 1/50 || 1/100 || - || - || 5 || - Trap effect: Damage: 4~8 Switch the position of 2 players || Sets a grade 2 trap Trap effect: Damage: 4~8 Switch the position of 2 players || 6 || 2-4 || 1/50 || 1/100 || - || - || 4 || - Trap effect: Damage: 5~9 Switch the position of 2 players || Sets a grade 3 trap Trap effect: Damage: 5~9 Switch the position of 2 players || 5 || 2-5 || 1/50 || 1/100 || - || - || 4 || - Trap effect: Damage: 6~10 Switch the position of 2 players || Sets a grade 4 trap Trap effect: Damage: 6~10 Switch the position of 2 players || 5 || 2-6 || 1/50 || 1/100 || - || - || 3 || - Trap effect: Damage: 7~11 Switch the position of 2 players || Sets a grade 5 trap Trap effect: Damage: 7~11 Switch the position of 2 players || 4 || 2-7 || 1/50 || 1/100 || - || - || 3 || - Trap effect: Damage: 8~12 Switch the position of 2 players || Sets a grade 6 trap Trap effect: Damage: 8~12 Switch the position of 2 players || 4 || 2-8 || 1/50 || 1/100 || - || - || 2 || -
 * 1 || Sets a grade 1 trap
 * 1 || Sets a grade 1 trap
 * 2 || Sets a grade 2 trap
 * 2 || Sets a grade 2 trap
 * 3 || Sets a grade 3 trap
 * 3 || Sets a grade 3 trap
 * 4 || Sets a grade 4 trap
 * 4 || Sets a grade 4 trap
 * 5 || Sets a grade 5 trap
 * 5 || Sets a grade 5 trap
 * 6 || Sets a grade 6 trap
 * 6 || Sets a grade 6 trap
 * }

Comments
Despite the spell's description it switches positions before placing the trap, so it is the caster who's surrounded by it and not the target. Whether this is a bug or intended can't be said for sure at this point.