Ureni, the Song Unending is Dragonlord Atarka, but bigger and more resilient
If the catch is successful, the Pokmon is tamed and under the Trainer's command from then on
If your opponent has any Benched Pokmon, this attack does 30 damage instead of 50 and choose 1 of those Benched Pokmon
So far in 2020, we've been averaging about one per month (and if you go back to the initial release in December, we've actually had 13 individual drops in three months, making the average closer to four drops per month since the series was announced), although the average is somewhat complicated by how you count themes that come with multiple drops, like the original Theros Gods during Worlds in February (technically, the Gods were five individual but related drops, although there is an argument for counting them as one big drop since buying all of the drops together was an option)
Imperial Recruiter is strong for both high-powered and casual players alike
Theres also textured foils returning, as well as a new foiling treatment in ripple foils