You can send "Fire Formation - Tenki" because you can add 1 Level 4 or lower Beast-Warrior-Typemonsteronly when it is activated. Since it doesn't have any more use after being activated it is a good target to send to the Graveyard, destroying 1 Spell/Trap Card your opponent controls.
Pair this card with "Brotherhood of the Fire Fist - Snake". When you send a Fire Formation to use this monster's destruction effect, the "Snake's" effect will trigger and let you set a new Fire Formation Trap Card to spring on your opponent later. You can even use the new trap card as fuel for "Gorilla's" effect on the next turn.