Kled, Cantankerous Cavalier

Haste, Trample, Conquer
Whenever Kled, Cantankerous Cavalier enters
the battlefield or deals combat damage to a
player, if you don't control a creature named
Skaarl, create Skaarl, a legendary 2/2 red Lizard creature token with haste.
As long as you control a creature named Skaarl,
Kled, Cantankerous Cavalier has indestructible
and "Whenever Kled, Cantankerous Cavalier
attacks, you may pay X life. If you do, creatures
you control get +X/+0 until end of turn."