Its a combo-friendly support piece that turns every spell into extra value
JAY: Green BENNIE: Green (no surprise, right?) SHANE: Blue TEJAI: White NIC: Green/Blue TEJAI: White/Green (I was a little surprised when TeJai became our fourth green mage) SHANE: Blue/Black BENNIE: Green/Black (Golgari for Life!) JAY: Green/White/Blue (Bant) BENNIE: Green/Black/Red (Jund) SHANE: Blue/Black/White (Esper) TEJAI: White/Green/Red (Naya) NIC: Green/Blue/Red (Temur) Sheldons group had a rule that there could be no more than three people sharing a color, but we decided not to enforce that and ended up with four green mages
this includes all the necessary Energy, Tools, Stadiums, support Pokemon such as Malamar, etc
Buying just these two cards separately in mint condition will run you the best part of $800, but that's only three to four booster boxes on a good day
But there is one card type that is core to what makes it work, and those are land cards
If a creature has +1/+1 counters and -1/-1 counters on it, state-based actions remove the same number of each so that it has only one kind of those counters on it