Heck, there are TWO card types with Ex in its name, but are technically and mechanically separate card types
Incapsula incident ID: 679000180012554765-2943581650617479
Developments such as the introduction of new generations of Pokmon or gameplay mechanics can significantly influence the future value of current sets
if you can move counters around with something like Nesting Grounds, you can keep your summons around for longer (and even speed up your other sagas!)
While it's easy to leave some creatures behind to defend you, it's a much safer bet to have your life total higher than anyone else's at the table, with an easy way to keep it climbing
In an article about kicker written by Mark Rosewater in 2007, he writes: It's too big of a mechanic Almost any mechanic that requires paying extra mana (or extra anything) can get shoehorned into the kicker box. That was 2007 , imagine how many more kicker-like mechanics have been released since then