In our D&D game, @kae_bytheocean just prevented a big fiery catapult barrage by opening a portal to an unknown dimension and sending the projectile through it.
👍️ We don't take what probably would've been a devastating damage.
👎️ We've written our DM a blank check as to what the projectile hit on the other side of the portal.
ship-to-ship combat in roll 20 is a nightmare when they start to turn.