With access to every color but blue, Saskia opens the door to tons of combos and design choices to give your deck a unique feel
Consider playing Palantir of Orthanc in a Thassas Oracle self-mill deck, for instance
And for most Elf players thats enough to give Dionus a slot in the 99 of their Elf deck
A 3/2 flash lifelink creature would already be playable in a control deck looking to stabilize, but this one comes with Swords to Plowshares attached
Its a complicated mechanic for sure, and one of the most individually complex mechanics overall, but not the worst mechanic if you ask me, and at the same time it's easy to grasp since it heavily draws from LotR lore
This Adventurer's real power comes from when it attacks, letting you exile the top card of your library and play it this turn