Over two turns, you get three +1/+1 counters on everything you control, or more if you can pump the Ouroboroid before combat
This starts a trend that affects basically all of the Tarkir: Dragonstorm new abilities: they were printed only on a handful of cards, which makes them artificially niche and obscure
Liliana, the Last Hope gets her spot on the list by enabling the vaunted single-card gameplan, where you sabotage an opponents targeted sideboard hate or plans to shift gears in the matchup by bringing in in a card that you can sculpt an entire gameplan around resolving and winning with
This has caused the limited edition Pokemon cards to be a bit more difficult to come by, meaning a lot of kids are not able to get their hands on the pack and the prices are skyrocketing online
Emerald, however, is good at keeping your opponent off balance at any point of the game