If you have no cards in hand when Fugitive Codebreaker's last ability resolves, you won't discard any cards, but you'll still draw three cards
Kolaghans Command Similarly to Prismari Command, theres hardly a bad time to draw Kolaghan's Command
However, the mana can only be spent on creatures with a mana value of four or greater or X in their cost
Outside of a spell heavy deck that doesn't sound like it is worth considering to me
Strixhaven: Arena's Most Expensive Set So far, Strixhaven hasn't made a major impact on Standard
3 mana for a 3 loyalty planeswalker is also an excellent rate, allowing you to play Aminatou early for access to an extra card in a pinch, providing easy setup of an inexpensive permanent with a relevant ETB ability and Aminatou on the same turn, or simply letting you play Aminatou late with mana up to protect it from countermagic or removal