Its an obvious inclusion in a Lord of the Rings focused version of the deck
The cost can be very easily offset and earn you more mana than you could ever need each turn if you build your deck all around kindred creatures that all share the same creature type
You draw cards equal to its power
There's even cEDH potential here, using Minsc & Boo's minus ability on himself to kill your own planeswalker so you can take advantage of infinite mana to play your commander again and again
event is always available, inexpensive, and offers you some choice in the types of cards you get, plus it adds far more total cards to your collection than a booster
Legendary Creature - Human Samurai Commander (CTRL to add secondary) Artifact Artifact (CTRL to add secondary) Copy Delina, Wild Mage Whenever Delina attacks, choose target creature you control, then roll a d20