Onieros, Jinxed Plaguemage

You, and permanents you control have protection
from curses.
At the beginning of your end step, put 3 +1/+1
counters on up to 1 target curse attached to an opponent. It becomes a creature in addition to its
other types, and gains "Whenever this creature
deals combat damage to a player, create a copy of
this enchantment, and attach the copy to
defending player."
"Don't look at me! They were like that
before I treated them! "