Slither Kulai, Ritual Offender

Double Strike, Deathtouch, Haste, Vigilance
When this creature enters the battlefield, she
deals 1 damage to target permanent.
When this creature becomes the target of a spell
or ability, you may pay {3}. If you do, counter the
spell or ability, then transform her.
There is one, however, who has long forgotten their
lessons in favor of others.