Today's card of the day is Burst
Lightning which is a strictly better upgrade to
Shock or Tarfire.
The difference option of additional
damage for extra mana makes it a better topdeck
later in the game and able to take out creatures
with three or four toughness.
Shock was quite popular while Lightning
Bolt was out of standard rotation, so an upgrade
here makes sense.
This is not a replacement for the Bolt,
but support for a heavy burn design.
For Constructed, Casual, and
Multiplayer this should replace any copies of
Shock or Tarfire unless playing in some kind of
block format that prohibits it.
In Limited this is one of the
top draft picks in Booster as cheap removal that
can later be used against larger targets.
With Sealed this should go in any deck
including Red mana without exception and is the
kind of card that makes playing or splashing the
color a serious consideration.