Defender of the Lava Realms

Flying
Whenever Defender of the Lava Realms attacks,
each attacking dragon gains trample until end of
turn.
{r}: Dragons you control get +1/+1 until end of
turn. Whenever a dragon you control gets to base
power and toughness 15/15 or higher this way, Defender of the Lava Realms deals 5 damage
to up to 5 target creatures and 15 damage to
those creature's controllers.