Abigail, The Petalmancer

When Abigail enters the battlefield Hex target
creature or planeswalker. (When a permanent
becomes Hexed it gains "If a source deals damage to
this permanent, it deals double that damage to this
permanent instead; multible instances are redundent.")
{x}, {t}: Hex X target creatures or planeswalkers.
X must be paid with {b}; activate only as a sorcery.
Hexed creatures lose all abilities and hexed
planeswalkers can't activate loyalty
abilities.