the power nine mtg cards Power Nine (9) - Magic:

Provide one promo to each event participant while supplies last

The main reason was and is to retain the value of those cards on the secondary market

Remember, class enchantments stack, so you can play multiple copies and trigger their abilities simultaneously, but each card needs to be leveled up separately

Proliferate Rules To give an additional counter to any number of players and/or permanents of each kind they already have

(Max Qty: 265) (Max Qty: 16) (Max Qty: 25) (Max Qty: 5) (Max Qty: 18) (Max Qty: 24) (Max Qty: 13) (Max Qty: 11) (Max Qty: 61) (Max Qty: 79) (Max Qty: 21) (Max Qty: 114) (Max Qty: 117) (Max Qty: 3)