Archangel Verivia

Flying, First Strike, Lifelink
When Archangel Verivia enters the battlefield,
angels and avariel you control gain first strike and vigilance until end of turn.
Whenever another angel or avariel enters the battlefield under your control, add {w}{w}, {u}{u}, or {r}{r}. Use this mana only to cast Instants or Sorceries.
Whenever an angel or avariel you control dies,
put a +1/+1 counter on target creature you
control with flying.