Chamber Sentry [Guilds of Ravnica] Fish Beast Set: Dominaria United Type: Creature

Set: Dominaria United Type: Creature — Serpent Rarity: Common Cost: {6}{U} This spell costs {1} less to cast for each instant and sorcery card in your graveyard

Set: Fifth Edition Type: Artifact Rarity: Uncommon Cost: {1} Whenever a player casts a green spell

Set: Dragons of Tarkir Type: Creature — Human Soldier Rarity: Uncommon Cost: {G}{G} As an additional cost to cast this spell

Gatha struggled to keep his experiments in and his patrons out

Set: Modern Masters 2015 Type: Instant Rarity: Common Cost: {3}{G}{G} Convoke (Your creatures can help cast this spell

Chamber Sentry [Guilds of Ravnica] Fish Beast Set: Dominaria United Type: CreatureSet: Guilds of Ravnica Type: Artifact Creature Construct Rarity: Rare Cost: {X} Chamber Sentry enters the battlefield with a +1 +1 counter on it for each color of mana spent to cast it. {X}, {T}, Remove X +1 +1 counters from Chamber Sentry: It deals X damage to any target. {W}{U}{B}{R}{G}: Return Chamber Sentry from your graveyard to your hand.