mtg cards like fling Fling, Set Name: Dark Ascension, 12 Target creature you control on the battlefield deals damage equal to its power to target creature or player. Fling MTG - Dark Ascension

$94.96 Save $9.53 Avatar: The Last Airbender expansion is still one of the most fun crossovers with the Magic: The Gathering trading card game in recent memory, and you can now grab two dozen packs for the equivalent of just over $3.50 each

This Zendikar Rising Commander deck includes 1 ready-to-play deck of 99 Magic cards, 1 foil commander card with alternate art, 10 tokens, 1 reference card, 1 deck box (can hold 100 sleeved cards), and 1 life tracker.

You can't pay that amount multiple times to multiply the effect

It's best in multi-colored decks as it will discount the spell by two mana, assuming the spell has the two colors you named in its casting cost

As it stands, hell be a great blocker in your Vehicle led decks that also crews like a champ