mtg card invoke prejudice then distribute four +1/+1 counters among any number of creatures and/or Vehicles target player controls. Invoke Prejudice - Legends

If at any point, you control more creatures that you have gained control of using this creatures first ability than there are creatures named Mind Slaver on the battlefield, return one of those creatures of your choice to its owners control, and continue returning those creatures until the number of creatures you control that you gained control of using this creature is equal or less to the number of creatures named Mind Flayer on the battlefield

What are the commander staples that almost every deck should run

Chandra, Spark Hunter has potential, though, but that'll depend on which vehicles accompany Chandra in her quest

17 Aesi, Tyrant Of Gyre Strait Pure Value One of the reasons that Simic is viewed as such a powerful color combination in Commander is that card draw and mana ramp are both integral parts of the format, with blue and green excelling in those areas, respectively