Corrosive Mentor [Shadowmoor] Welcome Deck 2017 Set: Modern Masters Type: Creature

Set: Modern Masters Type: Creature — Goblin Shaman Rarity: Uncommon Cost: {2}{B} Other Goblin creatures you control get +1/+1

Set: Ravnica: City of Guilds Type: Land — Island Swamp Rarity: Rare ({T}: Add {U} or {B}

the blocking creature gets -1/-1 until end of turn

Looks like you got bitten by a constellation

Corrosive Mentor [Shadowmoor] Welcome Deck 2017 Set: Modern Masters Type: CreatureSet: Shadowmoor Type: Creature Elemental Rogue Rarity: Uncommon Cost: {2}{B} Black creatures you control have wither. (They deal damage to creatures in the form of 1 1 counters.) Guttering cinders stoke their dying flames by snuffing out the lights of others.