Many of these cards, like Smothering Tithe and Rhystic Study, see seriously high demand from the Commander crowd
No, not in a typical sense
While this is still the main way the deck will operate, it takes a true master of time to control how to use the time counters to cast the exact spell at the correct time
Its base stats are not that bad either, so use Vigilance to maneuver
18 Kwain has a total converted mana cost of two ( one white, one blue ) and his rule text states Tap : Each player may draw a card, then each player who drew a card this way gains 1 life
Unlike mana, which you can't keep for very long if you don't spend it, energy counters stay with you turn after turn until you spend them or an effect causes you to lose them