To Save a Friend 3UW
Enchantment - Saga (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) [I/II] Exile another target permanent you control. Return that card to the battlefield at the end of turn. [III] Remove each loyalty counters from a Planeswalker you control. Put another Planeswalker card from your hand or graveyard into play with an additional loyalty counter on it for each counter removed this way.
While I know Venser is more of a slow blinker; since this wants to be used with planeswalkers what do you think of making it fast blink? Then it can reset planeswalkers for more use. Also, probably needs a restriction so it doesn't flicker a saga on entering then flicker itself on the second verse, repeating ad nauseam.
Increasing the cost and making the third trigger revive a planeswalker with the extra loyalty. This gives it more utility as it's fairly difficult to have multiple planeswalkers out on the field and it does something if you don't have any.
To Save a Friend 2WU
Enchantment - Saga I/II - Exile another permanent you own. Return it to the battlefield under your control. III - Remove all loyalty counters from a planeswalker you control. Return a planeswalker walker from your graveyard to the battlefield. Put that many loyalty counters to it.