mtg card worth Magic The Gathering 50 Cards!! Rares/Uncommons Only!!! No Commons!!! Magic Cards (Planeswalker, Dragon, Elves) : Toys & Games Valuing Magic the Gathering Cards:

It first shows the damage you take from attacking creatures, and then the damage dealt by defending creatures

The first counter allows Urzas Saga to tap for colourless mana, the second adds an ability you can pay two for to put a 0/0 Construct into play that gets +1/+1 for each artifact you control, and the final ability lets you search your library for an artifact with a mana cost of 0 or 1 and then put it straight into play

On the other, they add bold new designs that push the game in interesting directions

It works wonders in goblin decks, since those are very numerous by nature when you have a goblin commander like Krenko, Mob Boss churning out tokens