Some of the most direct gifts are cards like Steel Golem and Grid Monitor, which prevent their controller from casting creature spells
If the legendary nonland card exiled this way is a modal double-faced card, and the back face is also a nonland card face, you may cast either face, even if the back face isn't legendary
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
While colours are typically isolating, forcing players to go mono or even two-colour, playing three-colour cards, especially in limited can be extremely daunting
And if an opponent spends a removal spell on your planeswalker after you drew a card, that's a fine deal for you
Here is everything you need to know about abilities in Magic the Gathering