"Target player loses life equal to the number of permanents he/she controls. If that's too much life for that player, they can probably even get away with losing a few less. Additionally, that player may sacrifice 1/3-2/3 of their permanents to prevent this effect."
In fact, this card is pretty much worse compared to "Target player loses life equal to the number of permanents he/she controls." Remember, if you give your opponent a choice, they're going to pick whatever's better for them.
"Target player loses life equal to the number of permanents he/she controls. If that's too much life for that player, they can probably even get away with losing a few less. Additionally, that player may sacrifice 1/3-2/3 of their permanents to prevent this effect."
In fact, this card is pretty much worse compared to "Target player loses life equal to the number of permanents he/she controls." Remember, if you give your opponent a choice, they're going to pick whatever's better for them.
GX Tron XG
UR Phoenix RU
GG Freyalise High Tide GG
UR Parun Counterspells RU
BB Yawgmoth Token Storm BB
WB Pestilence BW