http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=5417
http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=5428

* fix
* fix

The effect is translated as :
①: The following effects are applied depending on the number of "black magician" "black magician girl" in each other field · cemetery. 

This effect also is " in each other field " , so make it LOCATION_ONFIELD in case of Dark Magicians being treated as Equip Cards , same as here : https://github.com/Fluorohydride/ygopro-scripts/pull/732

A lot of old cards i think need an update , if we follow that , especialy if it says "If "[X]" exists on field" , cuz if its says , "X monster" then u know its always LOCATION_MZONE , and u wont have to mention about the SZONE

Thank You!

OCG effect is : 
②: If "Black Magician" exists in your field, you can exclude this card from the Graveyard and activate it for 1 Magic / Trap card on the face-up side of the opponent's field
Update for LOCATION_ONFIELD , same as : 
-Dark Magic Attack - https://github.com/Fluorohydride/ygopro-scripts/blob/master/c2314238.lua#L18
-Thousand Knives - https://github.com/Fluorohydride/ygopro-scripts/blob/master/c63391643.lua#L19
etc.

Also , cuz of EVENT_FREE_CHAIN , added ..
1) e1:SetHintTiming(0,TIMING_END_PHASE) , same as : 
- Eternal Soul ( Special Summon Effect ) - https://github.com/Fluorohydride/ygopro-scripts/blob/master/c48680970.lua#L7
- If I Activate Card Of Demise in my Dark Magician Deck , I cant Special Summon with Magician Navigation , so the game asks me in the Opponent's End Phase

2) e2:SetHintTiming(0,0x1c0) , same as : 
- D/D/D Cursed King Siegfried - https://github.com/Fluorohydride/ygopro-scripts/blob/master/c44852429.lua#L14
- Any Quick Negate Effect with no Special Condition ..

for Duel.NegateEffect

for Duel.NegateActivation

http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=6244
http://www.db.yugioh-card.com/yugiohdb/faq_search.action?ope=4&cid=11542
These procedures are monster effects.

* errata Necrovalley

* summon proc necrovalley

* revert summon proc for ss only