Forum:How many times can i use the effect of Ritual Beast Ulti monster per turn?

Soo had a debate the other day while dueling, i had soul absorption out so i gain 500 each banished card, BUT with some of the Ritual Beast Ulti cards it says "During either player's turn: You can return this card you control to the Extra Deck, then target 2 of your banished monsters (1 "Ritual Beast Tamer" monster and 1 "Spiritual Beast" monster); Special Summon them in Defense Position, and then to get the Ritual Beast Ulti back the same turn i would banish those two and get that same card back and over and over till i gain alot of life points. Is this legal?? Can i really just jkeep increasing my life points each time with no limitations? Or can i only use the Beast Ulti effect once per turn? The card doesnt say "once per turn". Any help here?