Many exile effects are instant-speed, like a Relic of Progenitus activation, so they can be used as combat tricks
Left unchecked, this quickly takes over the game
Ashaya, Soul of the Wild can help you secure that second landfall trigger as it makes nontoken creatures into Forest lands in addition to their other types
Note: No cats, real or imagined, were hurt in the production of this riveting human drama
Both sides of the card are viable thanks to the spell denial on your turn, meaning this is one of the few cards that really encourages the transformation aspect of getting it down early for the lower cost, then paying the higher cost to transform it when possible
If Unidentified Hovership's second ability exiled more than one card (possibly because another effect caused it to trigger an additional time), each player who owns one or more of the exiled cards manifests dread