Arcane Cocoon

Cantrip (This spell consumes no mana, but can
only be cast if you have at least 1 mana available
of the corresponding color. Only 1 spell with
Cantrip can be active at a time).
Sit down for 1 round and create a 5HP magic
barrier that encloses you and absorbs all Damage
dealt to you. If it's still standing at the end of the
round, you heal 1HP.