Dimension Manipulation. 

• This ability allows the user to fully see to the other side of the portal like a one way mirror on a Wisdom saving throw 15, On a Failure The user takes 2d6 force damage and your memory is flooded with your death to the point where you feel like you are dying. 
• On your next turn you must use your action to make a Wisdom saving throw DC 15 on a success you are back in your body and take no further damage. On a failure you will roll your faith (1d4):
• Your Consciousness is lost somewhere in the endless void.
• The memory of others starts to turn into your own memory. If this happens more than 10 times you won't be able to tell them apart.
• Your conscious travelers deeper into the portal. Making the next turn is done with disadvantage.
• I guess Faith was in your favor here. But somehow your Consciousness made it back somewhat safe to your body.
• Allows the user to just basically control the time and pace where an already opened portal leads to. As long as the User knows what the place looks like and what time of day they can go to. Going into another dimension with any information is basically leaving it up to change and praying where it doesn’t go to doesn’t lead to an ambush.