Mighty Wrestler

Your mastery over varying wrestling maneuvers has gifted you with superior advantages when attempting to strike a target or grapple larger foes.  You gain the following benefits:

• Increase your Constitution by 1, to a maximum of 20
• Before you make a melee attack with an unarmed strike, and you are wielding no other weapons or a shield, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.
• You learn the Enlarge/Reduce spell and one 1st-level spell of your choice.  The 1st level spell must come from the evocation or transmutation school of magic.  Once you cast either of these spells in this way, you can't cast that spell in this way again until you finish a long rest. You can also cast these spells using spell slots of the appropriate level. Constitution is your spellcasting ability for these spells.