This spell instantly causes the humanoid creature it affects to gain weight, doubling its size and increasing its weight eightfold. This has the effect of increasing its size category up a notch. The target then takes into account a size bonus of +2 in Strength, a size penalty of –2 in Dexterity (1 minimum), and a –1 penalty on attack rolls and AC. due to its new size.
A large humanoid creature has occupied space and natural reach of 10 feet. However, the spell does not affect the subject's movement speed in any way.
If the required space is insufficient, the creature reaches the maximum possible size and can make a Strength check (taking into account the new value) to break any hindrance. If it fails, it is blocked but is not injured. The spell therefore does not allow you to crush a creature by making it grow.
Everything that the affected creature wears grows with it. Affected melee weapons and projectiles deal increased damage. If the subject drops one of their magnified
objects (including projectiles and throwing weapons), it instantly returns to their normal size. This True Strike 5e
that thrown weapons deal normal damage and that projectiles deal damage based on the size of the weapon that launched them. The magical properties of enlarged
objects are not affected by this spell. Thus, an enlarged +1 sword
has a +1 condition bonus, a wand as big as a staff retains the same powers, and a giant potion is only more diluted, meaning you have to drink more to get the desired result.
The magical effects increasing the subject's size are not cumulative, which means (among other things) that it is not possible to cast a second magnification on a humanoid that is already benefiting from it.