Puck, Spirit Protector

"As long as you control a planeswalker
named "Emilia, Frosty Princess" Puck,
Spirit Protector has 'At the beginning of
your upkeep, put a loyalty counter on target planeswalker you control.'
{1}{w}, Sacrifice Puck, Spirit Protector:
Prevent all damage that would be dealt to target planeswalker this turn."