Silrus Kahadrer

Vigilance
When Silrus Kahader attacks a player with the
most nonland permanents, that player sacrifices
X non-land, non-token permanents, where X is
the number of attacking Knights you control.
Whenever an opponent sacrifices a non-land,
non-token permanent, you create a 3/3 Black,
White and Red Knight creature token
Death to tyrants