Teleport Shield

Area 
Any attempt to Teleport (or Blink) into or out of the area of effect is at -5 to skill. Failed attempts to teleport in have the normal effects. Failed attempts to teleport out leave the caster where he started, physically stunned and having spent all the energy for the attempt! Doubling the energy cost increases the penalty to -10; tripling it increases the penalty to -15! 
This spell works against Teleport, Plane Shift (VH), and all their variations.

Duration: 1 hour. 
Base cost: 1/3 to cast (minimum 3- yard radius). Same cost to maintain. 
Time to cast: 10 seconds. 
Prerequisites: Watchdog and either Spell Shield or Teleport

Item 
Can be cost on an area of floor or ground, or on a rug or similar item. 
Energy cost to create: 50 per yard radius.