Suncraven Goblin

Whenever you cast a spell, your maximum hand
size is reduced by 1 until the end of your turn.
Whenever you discard a card, if your hand size is
greater than or equal to your maximum hand
size, you gain 1 life and each opponent loses 1 life.
The goblins of old, sensitive to the light, fled deep.
What could possibly have driven them back towards
the hated sun?