If you enjoy layering combos, controlling the pace of play, and burning down life totals with a flurry of spells, Niv-Mizzet, Visionary might be the deck for you
I think Mortality Spear is overrated and I think Magma Opus is underrated
Shalai and Hallar Putting counters on creatures can sometimes be a wasted effort if that creature gets removed
C OP12-002 Edward.Newgate UC OP12-003 Crocus UC OP12-004 Kouzuki Oden UC OP12-010 Douglas Bullet UC OP12-017 Color of Observation Haki UC OP12-023 Kawamatsu UC OP12-026 Kuina UC OP12-027 Koushirou UC OP12-029 Shimotsuki Kouzaburou UC OP12-032 Nekomamushi UC OP12-049 Buggy UC OP12-050 Jaguar.D.Saul UC OP12-051 Hina UC OP12-055 Mohji & Cabaji UC OP12-059 Concasser UC OP12-068 Gin UC OP12-072 Zeff UC OP12-076 Monet UC OP12-078 Brochette Blow UC OP12-083 Inazuma UC OP12-084 Emporio.Ivankov UC OP12-092 Mizerka UC OP12-093 Morley UC OP12-098 Hair Removal Fist UC OP12-103 Seto UC OP12-106 Trafalgar Law UC OP12-113 Roronoa Zoro UC OP12-114 Wyper UC OP12-115 I Love You
It also works with cards like Scapeshift or Seismic Assault quite nicely
Congregate ( Urza's Saga ) While on the surface it might seem like this card was designed for two-player games, as someone behind the scenes at the time, I know it was not