Fragile Shield

Reveal the top card of your library: Target a spell
you don't control. Then, counter that spell and
put a shatter counter on Fragile Shield. If the revealed card is a nonland card and the number
of shatter counters on Fragile Shield is greater
than the converted mana cost of that card,
sacrifice Fragile Shield. Put the revealed card on
the bottom of your library. You cannot activate
this ability again until after the next end step.
"I'm sure it'll hold up once or twice. Maybe.