Chatzuk, Mighty Guitarist

Chatzuk’s second ability can’t reduce the amount of colored mana you pay for a spell. It reduces only the generic mana component of that spell’s cost.

For many playtest cards, you’ll need to make a generous assumption that basic game rules would be updated to allow them to work. The Mystery Booster 2 Playtest Card Notes section (reproduced here in individual Gatherer rulings) provides guidance for fitting these cards into the existing rules structure.

If a creature with banding attacks, it can team up with any number of other attacking creatures with banding (and up to one nonbanding creature) and attack as a unit called a “band.” The band can be blocked by any creature that could block a single creature in the band. Blocking any creature in a band blocks the entire band. If a creature with banding is blocked, the attacking player chooses how the blockers’ damage is assigned.

If a creature in combat has banding, its controller assigns damage for creatures blocking or blocked by it.

Chatzuk’s second ability doesn’t change the mana cost or mana value of any spell. It changes only the total cost you pay to cast spells.

Playtest cards use a modified version of game symbols, such as {T} and {W}. These modified symbols should be treated as the standard symbols during play.