Cave of Eternal Struggle

Whenever a creature entering the battlefield
causes a Worldshaker ability to trigger, that
ability triggers an additional time.
Whenever a card is put into a graveyard from
anywhere you gain 1 life.
"The power surges are enough to kill anyone dumb
enough to get too close. Of course, no one's dumb
enough to do that." - An orc who was destroyed by a
power surge