Trial of the Pure

You can't cast spells with less than three
coloured mana symbols in that card's mana cost.
Whenever you cast a spell, Trial of the Pure deals damage to any target equal to the number of
coloured mana symbols in that card's mana cost
and you gain that much life.
"The Empire would burn the corruption from Belenon
with the piled bodies of the innocent as their kindling."
- Ceros, Wandering Scholar