Aliens

Quick gameplay tips

Lots of cards cannot be destroyed but far fewer are immune to being returned to their owner's hand. Use these removal abilities on a powerful minion that thinks it's safe, or on opponents that struggle to play lots of minions
You can even 'destroy' an enemy minion with this method - return the offending minion to your opponent's hand and then use Probe to force them to discard it, it's functionally destroyed but sidestepping any shenanigans that your opponent may have been counting on
Remember you can abduct your own minions! Use this to cheese out powerful abilities multiple times
Use whatever tutor cards you can to get your Invaders as soon as possible! The earlier you draw them, the sooner you can start sneaking points

Gameplay

Look, in the sky! It's a UFO! The Aliens are here, and they're not about to leave without a prize...

The Aliens specialise in beaming up inconvenient minions, sending them back to the mothership (opponent's hand) where they can't disrupt their invasion. Their main gameplay strength is dropping in on a base just long enough to score some points, then extracting their strongest minions to conquer other worlds. They've even got the potential to go to brand new worlds nobody else has yet! Their Terraforming action lets them replace a base in play with one of their choice from the base deck, allowing them to swing the tides of victory in their favour by introducing a newer, more favourable base. Aliens also have some other utility, Disintegrator lets them send particularly inconvenient minions to the bottom of their opponent's deck - useful against Zombies and other factions that refuse to stay dead. The Aliens' main drawback is their lack of strength, their minion power is lower than average and they have no ways to gain power. Instead, they rely on slowing down other players so they can pop a base when the time suits them and farm VP with Invaders in the meantime.