Engineered Explosives
Mana cost
Mana value0TypeArtifact
Color identity
Colorless
RarityRare
SetStar Trek (TRK)
ArtistDavid Álvarez
Price€3.22 · foil €20.33 · $3.04
Engineered Explosives 
Artifact
Sunburst (This artifact enters with a charge counter on it for each color of mana spent to cast it.)
, Sacrifice this artifact: Destroy each nonland permanent with mana value equal to the number of charge counters on this artifact.
At the point of impact, a photon torpedo mixes matter and antimatter to powerful effect.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernLegalLegacyLegalVintageLegalPauperNot legalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulNot legal
Rulings
2020-08-07
You can choose any value for X as you cast Engineered Explosives. The value chosen for X doesn't directly affect the number of charge counters Engineered Explosives enters the battlefield with, but it does let you pay more mana and thus spend more colors of mana to cast it.
2020-08-07
Colorless mana won't give Engineered Explosives another charge counter. Colorless is not a color.
2020-08-07
Tokens that aren't a copy of something else don't have a mana cost. Anything without a mana cost normally has a mana value of 0.
2020-08-07
If a permanent has in its mana cost, X is considered to be 0.
Printings (9)

Star TrekTRK #480 · Rare · —

Star TrekTRK #264 · Rare · —

Mystery Booster 2MB2 #218 · Rare · €3.22

Double Masters2XM #252 · Rare · €3.78

Ultimate Box TopperPUMA #U28 · Mythic · —

Ultimate MastersUMA #227 · Rare · €3.60

Kaladesh InventionsMPS #36 · Special · —

Modern MastersMMA #204 · Rare · €3.44

Fifth Dawn5DN #118 · Rare · €4.66