Amulet of the Planar Assassin

Once per day while wearing this amulet, you can use an action to name a plane you are not currently on and a time relative to your current plane. Then make a DC 15 Intelligence check. On a successful check, you cast the plane shift spell. On a success, you land exactly where and when you attempted. On a failure, roll using the rules below.

Roll 1d100 for Space: 

• 1 to 33 - you land at a random location on a random plane
• 34 to 66 - you land at a random location on your target plane
• 67 to 99 - you land at a similar location on  a different plane
• 100 - you land at the correct place on the correct plane

Roll 1d100 for Time:

• 1 to 20 - you land 1d10 decades after your target
• 21 to 40 - you land 1d10 decades before your target
• 41 to 60 - you land 1d8 years either side of your target at your DMs discretion
• 61 to 80 - you land 1d6 months either side of your target at your DMs discretion
• 81 to 99 - you land 1d4 days either side of your target at your DMs discretion
• 100 - you land at the correct moment in time

If you roll a 100 for both Space and Time, you and everyone affected by this spell are banished to the Astral Sea.

Notes: Teleportation, Exploration, Jewelry