Colossify

You cause a creature you can see within range to grow larger for the duration. Everything it is wearing and carrying changes size with it. Any item dropped by an affected creature returns to normal size at once. The size of the creature is doubled in all dimensions, and it's weight is multiplied by eight per category increase. If the target is unwilling, it can make a Constitution saving throw. On a success, the spell has no effect.

This growth increases its size to a Max of Spell Level/2 category(s) (Rounded down). If the target's growth is blocked by it's surroundings the target takes 1d4 damage for each size increase beyond constrained size.

Until the spell ends, the target has advantage on Strength checks and Strength saving throws. The target's weapons also grow to match its new size. While these weapons are enlarged, the target's attacks with them deal 1d4 extra damage per category increase. Enemies also have advantage to hit the target.