Trying to make a sword that teleports the player where theyre looking but without getting stuck in blocks

I assume you're using the player's look angle vectors and multiplying by eight. You could simply check if the block at that position, and the block directly above it aren't solid, (and cancel the teleport if it is). You could also change the amount your multiplying the vectors by to smaller numbers each time there's a solid collision, in order to make the teleport stop before it hits a wall instead of straight up canceling it.