At a cost of seven mana, that transform ability will probably come fairly late in the game, but its still a good idea to lean into +1/+1 counters as part of your strategy
Job Select, Create Your Hero Borrowing from Final Fantasys classic Job System , some Equipment cards now let you create a 1/1 Hero token with a specific class
The number of discard cards at your disposal is insane The sheer number of discard cards you can play is pretty incredible when you combine Amber and Emerald

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From a rules standpoint, it's a little unclear yet how Wizards of the Coast could utilize proliferous Artifact subtypes
Its deck dependent, but taking one of these is a good bet