Breath of Flimaghor,

Breath of Flimaghor deals 3 damage to target non-dragon creature, if you control a dragon as you cast Breath of Malziar, it deals 5 damage to that creature instead, if you control Flimaghor, Malziar's flame, it deals 6 damage to that creature instead.
When traveling Malziar, the sharp rocks are your least concern.