This commander grants every instant and sorcery in your hand a Miracle cost of (2)
The biggest is that it costs two Blue mana, which doesnt sound like much until youre trying to cast other Blue spells in the same turn
Give opponent something, then steal it back (artifacts?) Counterfeit money, fool's gold Treasure likingbonus for casting it with treasure Mining, prospecting, destruction of environment Stagecoaches Reputation, build it up (gaining a name for legendary cards) Notoriety, becoming notorious Notorious 4 (At end of turn, if this creature is nonlegendary and has dealt 4 or more combat damage, put two +1/+1 counters on it and it becomes legendary.) Shifting loyaltieschanging card type, put on other player's creatures Creatures come with counters that spread them to other creatures (the posse, the gang)
A souped-up prowess trigger that gives you counters looks very powerful, but it does have a big downside that it only starts out as a 1/1 for 2 mana
That has to be worth something in the context of a deck that basically lived and died on its ability to create a wave of card advantage via that enchantment