Caldrend, Draconic Acolyte

Whenever you cast a spell with mana value 5
or greater, Caldrend deals damage equal to its power to any target. If that spell was a Dragon spell, Caldrend deals twice that much damage instead.

Dragon spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a Dragon spell pays for {1}or one
mana of that creature's color.)