Keeper of Storms

Flying, Haste, Frenzy 1
Whenever a creature enters an opponents battlefield, deal 1 damage to a random creature
they control. If a creature died from this effect,
you lose 1 life or its owner gains 1 life and you
conjure a Hyrulean Knight to the top of your
library.
When you are dealt non-combat damage by an opponent, deal it's controller 1 damage.