Portals are a permanent rift between two locations and can only be connected to other Portals. You make one then you make the other (or a friend does) and you connect them. You always know where they’re going to go. They are opened for a cost of Oort Shards for 60 seconds, and then they close again but they can be opened again and again (for the cost of Oort Shards).
Warps are a temporary rift, open for 60 second only, between where you are and either…
…a completely random world (within the same band of worlds, eg: tier 1)…a specified location (using a location token)…a specified online player (using a player token)You can only travel to the maximum world tier you’ve unlocked (see about tiers here if you don’t know about them) or the rift will tear you apart as you’re not strong enough.