[MapleSEA] Content addition v137.1

Looks like SEA got screwed again. Shrine guardian looks promising, but it probably sucks just as much.

At least the EXP from the mobs there doesn't look too bad. They have like 10% the HP of the Future Erev mobs, but give more than 10% of their exp. So yeah, better ratios.

Though that's not saying much. :/