Time Warp

You imagine a specific period, including year, date and time, in the past. You and up to eight willing creatures within range fall unconscious for the spell’s duration and experience visions of a cylindrical corridor surrounded by formless, swirling shades of white and grey. If the spell reaches its full duration, the visions conclude with each of you reaching the end of the corridor and being swallowed by pure white light. The spell then ends with you mentally and physically transported to the period you imagined.

To cast this spell, you must have a magic item that existed during the period you imagined. Your physical destination in the past is a safe location within 1 mile of where you cast the spell. Alternatively, you can cast the spell if one of the affected creatures was alive during the other time.

The spell ends early on a creature if that creature takes any damage, and the creature isn’t transported. If you take any damage, the spell ends for you and all the other creatures, with none of you being transported.

At the end of the spell's duration, you and all creatures who transported with you are transported back to the exact place and time you cast the spell. Your actions in the past affect the present at the end of the spell's duration. For example, destroying a magic item in the past that exists in the present means the magic item will be destroyed at the end of the spell's duration. 

The stress of casting this spell weakens you. If you successfully cast the spell, the following effects begin at the end of its duration:

• Each time you cast a spell until you finish a long rest, you take 1d10 necrotic damage per level of that spell. This damage can't be reduced or prevented in any way
• Your Strength drops to 3, if it isn't 3 or lower already, for 2d4 days. For each of those days that you spend resting and doing nothing more than light activity, your remaining recovery time decreases by 2 days
• You are unable to cast time warp again for 1d8 days