Region-free and tested for reliability
Losing 3 life is a price worth playing to deal with any permanent controlled by any player while it gets around recursion and indestructible
I dont think its really relevant for game design whether people sleeve all their games, its more relevant whether people intend to sleeve the game youre designing
More common are kinds that change a type based on flavor, like converting something to a vampire with New Blood, resurrecting a hero as an angel warrior with Ascent of the Worthy, cursing the greedy to become, um, walls with Aurification, or resurrecting cards as zombies with Dread Slaver
There isnt a ranked mode yet, and while there are online events that give rewards for racking up wins, the threshold to acquire these seems pretty low so farfor example, you dont need to get a single win to get the best rewards in the current ongoing event, you just need to participate in 10 matches