Ildaron, the Subduer

Oath {w}{u}{g} (Whenever this creature attacks and
isn't blocked, you may pay its oath cost. If you do,
put an oath counter on it)
At the beginning of your upkeep, if Ildaron, the Subduer has an oath counter on it, you may
remove it. If you do, exile target creature.
Landfall - Whenever a land enters the battlefield
under your control, put an oath counter on
target creature.