Card name: Kalastria Nightwatch
Mana Cost: CMC4Color B
Converted Mana Cost: 5
Types: Creature — Vampire Warrior Ally
Card Text: Whenever you gain life, Kalastria Nightwatch gains flying until end of turn.
Flavor Text: "Kalitas may have returned to mindless servitude beneath the Eldrazi, but we say never again."—Drana, Kalastria bloodchief
P/T: (4/5)
Expansion: BFZC Battle for Zendikar
Rarity: Common

Kalastria Nightwatch
Card rulings (?)
2015-08-25 The ability triggers just once for each life-gaining event, whether it's 1 life from Drana's Emissary or 7 life from Nissa's Renewal.
2015-08-25 A creature with lifelink dealing combat damage is a single life-gaining event. For example, if two creatures you control with lifelink deal combat damage at the same time, the ability will trigger twice. However, if a single creature with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once.
2015-08-25 In a Two-Headed Giant game, life gained by your teammate won't cause the ability to trigger, even though it causes your team's life total to increase.