Mana Tithe
Instant
Counter target spell unless its controller pays 
.
"Those who seek to upset the balance must be taxed for such ambitions." —Verithain, mesa high priest
Martina Pilcerova
The List (PLST)
• #PLC-25Rulings
The payment is optional.
(wotc • 2004-10-04)
Rulings
The payment is optional.
(wotc • 2004-10-04)