Go get em: This is an ongoing ability that will give any alien character Challenger +2 and the ability to challenge ready characters on the same turn
In the case of Rona, Herald of Invasion, that becomes an infinite combo outlet alongside cards like Mox Amber and Retraction Helix
There are technically 26 different Magic: The Gathering color combinations that you could use when building a deck, and 25 of them have obscure lore-based names attached, which experienced players tend to use freely, but can be confusing for newcomers
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The matchmaking, if it's a thing, sure doesn't feel like it, and frankly winning competitive matches or having expendable income seem to be the only real ways to get cards
But why would you want to get life gain for your deck after having discussed how it is a dead resource unless you can abuse it