Zombie apocalypse

Overwhelm 8 :(make 8 cards unblock able and deal an
additional half of there damage until end of turn.
If this card damage is uneven choose
the upper damage percentile.)
"You are overwhelmed with the power of destruction at
the mere cost of my finger tips and pain shall rain upon
you from now on.
The overwhelming pain will bring suffering to your eyes and watch your world crumble in front of you."