Forbidding Ice

You awaken the ability to mentally connect with others, granting you the following benefits:

• Increase your Wisdom, or Constitution score by 1, to a maximum of 20.
• You can spend 3 ki points as your action or reaction to encase yourself in a block of magically hardened ice.
• When encased in this ice, you gain resistance to all damage, you don’t need to breathe, and your AC can’t be less than 18 (regardless of what kind of armor you’re wearing). However, attack rolls against you have advantage, and you can’t move or speak.
• You can disperse the ice at any time by using your action.
• When encased in this ice, you can telepathically speak to any creature within 5 feet of you, or up to a mile away if they are encased in ice from this ability or something similar.