Leonin Vanguard (M19)

Creature — Cat Soldier

At the beginning of combat on your turn, if you control three or more creatures, Leonin Vanguard gets +1/+1 until end of turn and you gain 1 life.

1/1

The best fighters are skilled in both harming and healing.
Aaron Miller
22/280
uuid: 86a5422f-abe1-5090-ac5d-6eb7215d8d7a

2018-07-13:
If you don’t control three or more creatures as your combat phase begins, Leonin Vanguard’s ability won’t trigger at all. Causing a permanent to become a creature during the beginning of combat step won’t cause Leonin Vanguard’s ability to trigger.
2018-07-13:
If you don’t control three or more creatures as Leonin Vanguard’s ability resolves, the ability does nothing. However, if you do control three or more creatures as it resolves, the +1/+1 bonus doesn’t stop applying if you no longer control three creatures later in the turn.