you may add one mana of any color
Set: Kaladesh Inventions Type: Artifact Creature — Construct Mythic Cost: {3}{G}{G} Trample When Verdurous Gearhulk enters the battlefield
Set: Portal Three Kingdoms Type: Creature — Human Mystic Uncommon Cost: {2}{G} Hexproof (This creature can't be the target of spells or abilities your opponents control
Set: Arena League 1999 Type: Basic Land — Mountain Rare Cost: ({T}: Add {R}
Activate only if you control three or more artifacts
Odric, Lunarch Marshal [Shadows over Innistrad Promos] Legends you may add one manaSet: Shadows over Innistrad Promos Type: Legendary Creature Human Soldier Rare Cost: {3}{W} At the beginning of each combat, creatures you control gain first strike until end of turn if a creature you control has first strike. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, skulk, trample, and vigilance.