They appear in sets like Ikoria and New Capenna, but we might see similar designs in the future as they have proven quite popular among players
I often feel like the top 10 cards can be switched around depending on what your game looks like
It offers strong removal, reanimation, and life-as-a-resource mechanics
The black spell can force you to sacrifice your creature with the highest mana value, which is often either going to be your commander or game-winning piece
This works perfectly in conjunction with the location cards, of which there are plenty
Causing players to turn one of their non-island lands into an island each turn in the form of flood counters, Quicksilver Fountain enables your merfolk with islandwalk across the entire board while also slowly interfering with the mana of any of your opponents who aren't playing blue