Whenever this creature attacks, you may tap X untapped Myr you control
Put a flying counter, a first strike counter, and a lifelink counter on that creature
Pair it with cards like Cathars' Crusade, Hardened Scales, Rattlechains, or Supreme Phantom to maximize whichever direction you choose
At first glance, okay getting to Brainstorm when they enter play is useful but not THAT powerful, although obviously you're in blue so you can do a bunch of blinking to get extra value
If a creature that dies leaves the graveyard before Meathook Massacre II's second or third ability (as appropriate) resolves, that creature won't return to the battlefield whether or not life was paid
Buehler said that although the set was not a modern design, it would go through modern development and released with modern Magic text and wordings