For example, when you take your beginning phase, you'll have an untap step, an upkeep step, and a draw step, and then the next player in turn order will take their beginning phase
Lavinia, Foil to Conspiracy came straight from Ravnica: Clue Edition - She has an interesting ability that creates Clues each time you cast your second spell, and also gives you 2 colorless mana on your opponents' turns
When you add in land-searching options like Town Greeter and the landcyclers, as well as four-mana ramp spells like Reach the Horizon, getting the mana together to cast Omega, Diamond Weapon or Coliseum Behemoth is a question of when, not if
Prismatic Ending and Counterspell are great answers against everything including Lurrus on the stack and the permanents it could return