Index: skill.c
===================================================================
--- skill.c	(revision 15)
+++ skill.c	(working copy)
@@ -13146,6 +13146,19 @@
 	
 	// Check for cost reductions due to skills & SCs
 	switch(skill) {
+		case ASC_EDP:
+		{
+			int i;
+			for(i = 0; i < MAX_INVENTORY; i++)
+			{
+				if(sd->status.inventory[i].nameid == 20001)
+				{
+					req.itemid[0] = 20001;
+					req.amount[0] = 1;
+				}
+			}
+		}
+		break;
 		case MC_MAMMONITE:
 			if(pc_checkskill(sd,BS_UNFAIRLYTRICK)>0)
 				req.zeny -= req.zeny*10/100;