The Elderspell

You get an Emblem with: "Whenever a Planeswalker
leaves the battlefield, put X Loyalty-Counters on
target Planeswalker, where X is the number of
Loyalty-Counters
that were on the Planeswalker that left the battlefield."
Destroy up to 3 target Planeswalkers.
"The next step is a gigantic invasion."