We have previously seen it in only collector boosters (planeswalkers in collector's boosters for Bloomburrow ), multiple types in each play/draft booster ( Wilds of Eldraine , and March of the Machine ) as examples, and more
If there's a cost associated with having it block the creature, its controller isn't forced to pay that cost, so it doesn't have to block in that case either
In this manner, they act a bit like the Mega Evolution mechanic from the Pokemon games, though the new forms are more like a golden coat for an impressively lustrous appearance
I never stuck with it, but did enjoy playing basic decks against some friends a few years ago
Best Prevent All Damage Payoffs A primary use of these cards, specifically the non-Fog varieties that prevent noncombat damage, is protecting your board from a variety of board wipes
It was felt that American kids would prefer more powerful-looking monsters, yet Hiroshi Yamauchi was having none of it