Reign, Royal Archer

Every time "Reign, Royal Archer" attacks create
a 1/1 royal token
Tap - Sacrifice 1 royal token for a 1/2 Guard
Tap - Sacrifice 2 royal tokens for a
2/3 Elite Guard
Tap - Sacrifice 3 royal tokens for a
5/5 Royal Protector
(you can only have 3 royal creatures)