Nasty. The most impressive part about the design is the way it hoses strategies that are traditionally White and Green, without actually saying so. The name is weak, though.

I'm certainly happy to change the name if anyone has any better suggestions. You're right - an enchantment shouldn't really have an active verb for a name. It's slightly saddening that it's the kind of ability that will basically never trigger - it could almost read "Creatures with power 1 can't attack or block" - but on the flip side, it does let Johnny have a fun challenge with Lure effects or "must attack" effects.

"Oppression of the Weak" or simply "Oppression" might work better.

Exactly power 1, or power 1 or less?

Was originally meant to be "exactly 1", but flavour would probably work better as "1 or less". Changed.

"Oppression" on its own is quite an iconic name; probably prefer not to use it up on a somewhat kooky enchantment.

Maybe just change it to Oppress the Weak ? and for what it does I think it is undercosted for an Uncommon, maybe or a move to rare? depends on how much P/T shrinking (a la Disfigure ) there is in the set.

Perhaps you could make it: "Whenever a creature with power 1 or less attacks or blocks, destroy it at the end of combat. Its controller loses 1 life."

It does seem undercosted.