Pulled into the Gloom

Convoke (Your creatures can help you cast this spell.
Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
If a source you control would deal damage to a permanent or player, it deals triple that damage instead.
"N-no! Traveler, don't do it! If you touch that, well..
It'll sap your strength, and you'll end up like me..."
- Bahni