Its not worth the memory issues
Moonshaker Cavalry is a great payoff for having a large battlefield, as it'll give all your creatures a massive stat boost, usually enough to win the game the turn you play it
With enough creatures out, Jetmir plus the sorcery Titanic Ultimatum is almost a surefire way to take a player out of the game
After the defense has been announced, a blocked attacking creature attacks only -24- the creatures blocking it, even if the blockers are somehow neutralized or destroyed before the attack is resolved
When I say vintage Im talking the early years of Magic: The Gathering during that period of 1993 to probably the late 1990s
To get maximum value out of it, youre either using EtB creatures or the aforementioned effects, as you have to tuck some of your stuff under it too