Talk:Demon Core/@comment-26464987-20160120170440

Effectiveness of BC:

Description : Fills 2 BC/Turn, 3-4 BC when attacking, 2-3 BC when attacked, 3-5 BC when defeating an enemy, 5-7 BC when the round is completed

Taking average of ranges:

Let "x" represent the number of enemies.

1st Turn: 2+3.5+4(x)+6= 11.5+(4x)  Under 1 turn OTK (max average) ; 2+3.5+4(x)= 5.5+4(x) (min average)

Enemy Turn: 2+2.5= 4.5 (assuming no DoT) ; maximum average BC on enemy turn if unit is hit.

Total after 2 turns: (min average+enemy turn)= 5.5+4(x)+4.5)= 10+4(x)

Therefore its effectiveness is slightly less than Sacred Crystal(11 BC fill). Under the circumstance that enemies can be defeated easily, the situation is reversed(Demon Core would be better).

For a cost of 20k merit points its average value is almost the same as a Sacred Crystal which is only redeemable once. I'd say its a very worthy buy, considering you won't be getting as many good BC/BB fill spheres anywhere else.