Study Hall

At the beginning of your end step choose one —
•Take an extra turn.
•Create X copies of Tough Decision that are also Colorless 4/4 Golem Enchantment Artifact Creature tokens with haste, vigilance, annihilator 3, {t}:add {c}{c}, and {c}:{ut}, where X is the number of permanents currently in play.
Study Harder you may pay {p/c} and choose two.
{t}:add one mana of any color in your commander's color identity. Learn.
Study until you can't get it wrong.