A permanent's mana value is determined solely by the mana symbols printed in its upper right corner (unless that creature is the back face of a double-faced card, is a melded permanent, or is copying something else
(2026-01-27) Spells can only be cast for their sneak costs any time you could play an instant during the declare blockers step on your turn (after your opponent has decided whether to block)
2010 Sets : Worldwake , Rise of the Eldrazi , Magic 2011 , and Scars of Mirrodin My Pick : Eye of Ugin ( Worldwake ) My pick for 2010 is Zendikar block, the original plan was for the fall to have a large set and the winter set to be a small set, with both taking place on Zendikar
While it does cost a fair bit of mana, doing this nets you Ragnarok, Divine Deliverance
Final Thoughts on MTG Card Storage Organizing and protecting your MTG cards is a rewarding part of being a serious collector