Sliver Hive [Magic 2015] Dragons of Tarkir Promos or triggered ability

or triggered ability

should another take your place

Set: Limited Edition Beta Type: Enchantment — Aura Uncommon Cost: {2}{U} Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller

It was Gerrard's nature to lead and the Mercadians' to follow

Set: Unlimited Edition Type: Artifact Rare Cost: {0} {T}: Add {B}

Sliver Hive [Magic 2015] Dragons of Tarkir Promos or triggered abilitySet: Magic 2015 Type: Land Rare Cost: {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a Sliver spell. {5}, {T}: Create a 1 1 colorless Sliver creature token. Activate this ability only if you control a Sliver.