Place the following runes in the spell block and activate tham as
normal:
+---------+---------+
| / | |\\ / |
| / | | \\/ |
| ( | | |
| \\ | | /\\ |
| \\ | |/ \\ |
+---------+---------+
Your party should now be invincible, while still able to build up
their stats.
In Loki's shrine use the empty bottle on the front to rise to a
rune, Urgha uses the rune spell to get invulnerability.