For starters, pinging each opponent every time a land enters is just a great effect
I'm happy with either outcome." Liliana Vess Number 102 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (7/1/2012) The effect is based on the number of Swamps you control when Mutilate resolves
Cards like Timetwister, Bazaar of Baghdad, The Tabernacle At Pendrell Vale, and Mishra's Workshop all come to mind
Despite their fantasy fiction pedigree, Oozes are a somewhat underrepresented Creature type in MTG, but the new card Slime Against Humanity may well see a flurry of Ooze typal decks constructed once Murders at Karlov Manor hits the shelves
Singer of Swift Rivers Fast merfolk are better than slow merfolk
Pokemon coins are a nice little bonus collectible, which also have a practical use in-game (deciding the first player and the outcome of using certain abilities during play), and the mini portfolio is also a good, if short term, way of storing your favourite cards