Make divine wrath contingent on XP gain.

For every 1% of an XL you gain, there's a 10% chance of any particular
god angry at you attempting divine retribution on the next "every 20
aut" timer (i.e. 100% chance of *someone* throwing wrath at you if you
have ten angry gods; less for less gods). This translates into ten
wraths per XL, which, on an average of 2 penance lost per wrath, means
20 penance is on average equal to one XL worth of wrath.

For perspective, the following penance values are used on abandonment:
- 25: Cheibriados, Dith, Makhleb, Vehumet, Zin
- 30: Elyvilon, Fedhas, Jiyva, Kiku, Yred, TSO
- 50: Beogh, Dithmengos, Lugonu, Sif Muna, Trog
- 150: Nemelex Xobeh (but only active above 100 penance)

...so for the "normal" wraths (Ashenzari wrath is already special), you
can expect wrath to last either 1.25 XL, 1.5 XL, or 3 XL (or an equivalent
amount of experience).

In practice, because wraths still - at their core - happen on a timer,
you end up with wrath either during or after significant battles, when
the player is depleted - exactly when an angry god would try to kill
you.

These numbers can probably be fudged further; I think this may make
wrath happen too often (even if it's at relevant times), but time will
tell.

1 files changed, 1 insertions, 0 deletions

diff --git a/crawl-ref/source/religion.h b/crawl-ref/source/religion.h
index 08ff081dc0..e007fad87c 100644
--- a/crawl-ref/source/religion.h
+++ b/crawl-ref/source/religion.h
@@ -78,6 +78,7 @@ bool god_can_protect_from_harm(god_type god);
 int elyvilon_lifesaving();
 bool god_protects_from_harm();
 bool jiyva_is_dead();
+void set_penance_xp_timeout();
 bool fedhas_protects(const monster* target);
 bool fedhas_neutralises(const monster* target);
 void print_sacrifice_message(god_type, const item_def &,