"The standby phase is there in case you have Trap Cards, Quick-Play Spell Cards, or Monster Quick Effects that can be activated."

Marik's glad for it although he hopes he's an alright teacher.

"Sort of! As the same with the Standby Phase, there's some Spells, Traps, or Monsters that can't pop off their effects unless the specific timing has been met which is usually what the Main Phase 2 is for."