Colourless Pestilence that costs + to set up and keeps one of your creatures tapped but alive?

I, um, well, isn't strictly better than but you've very nearly obsoleted a card that got removed as being too good.

hmm. That's a good point. Perhaps make it run on charge counters, in the same fashion as the Missile Launcher?

I'm surprised that this doesn't destroy walls.

I don't think there's room to add that ability, the card is a bit squished as it is.

I meant instead of doing what it does, rather than in addition.

Eh, It's mainly supposed to be a weapon. Walls are fairly rare, so destroying them isn't very useful.