True colossus size

You touch a creature and make them grow to size category gargantuan. Everything they are wearing and carrying changes size with them. Any item that is dropped return to normal size. A thrown weapon or a piece of ammunition returns to normal size immediately after it hits or misses a target. If the target has currently the grappled condition the size increase brakes them free. However if there is no space to grow to gargantuan size the spell is unable to be casted.

While transformed this way they gain the following benefits:

• Their strength score increased to 30
• Their weight is increased by a factor of 500
• Their carrying capacity is in increased by 3600 pounds
• All movement speed increased by 30 feet
• Any bludgeoning, piercing or slashing damage dice from melee attacks are tripled