Avediel, Divided Devotee

When Avediel enters the battlefield choose Seraphs or Usurpers:
Seraphs - Whenever one or more creatures you control deal combat damage to a player, put an exalted counter on target land you control. If only one creature attacked this turn, you may search your library for a basic land card and put it onto the battlefield tapped. Then shuffle.
Usurpers - Whenever one or more creatures you control deal combat damage to a player, draw a card. If only one creature attacked this turn,