Yezarhim, Eternal Beacon

When Yezarhim, The Eternal Beacon enter the
battlefield, search your library for a Planeswalker
card, reveal it, and put it into your hand.
You may spend mana as though it were mana of
any color to cast planeswalker spells.
If one or more Loyalty counters would be put
on a Planeswalker you control, that many plus
one Loyalty counters are put on it instead.