Tolbin's Trumpeting Terror

You attempt to summon a mammoth or war elephant. The caster calls the name of previously purveyed pachyderm effigy and summons a mammoth or war elephant in a unoccupied space within 30 feet. if there is not enough space for the creature the spell fails. If the caster opts to summon the creature in open air the creature suffers fall damage and inflicts 4d6 damage to anything it falls upon. the creature then becomes hostile toward the caster as well. If summoned normally the creature operates under the caster's direction using it's initiative. Use creature stats from the Monster manual for elephants. Using a 5th level spell slot you may increase the duration to 8 hours. 7th level Summon one additional elephant. 9th level you may also add the element of thunder allowing their attacks to do an additional 3d8 thunder damage.