Avatar of Determination

Indestructible, Hexproof, Flying, First Strike, Vigilance, Lifelink
Whenever your life total would go below 1, of Avatar of Determination is in your hand, you may sacrifice 7 or more soldier creatures, if you do, put Angel of Determination onto the battlefield, then you gain 7 life.
Whenever you gain life, search your library for any number of soldier creatures with converted mana cost X or less, where X is the amount of life you gained.