As a beginner, the task of creating your first deck can be daunting especially since youre looking at hundreds of cards that each do unique things
First, we've got Trial // Error, a split card that combined has Esper colors, that is, until you realize it doesn't have the fuse keyword that would let you cast both parts of it
Tamiyo starts out as a superbly cheap creature who can generate card advantage, but if you can draw three cards you get a somewhat slow value engine that can recur instants and sorceries
The fact that you can cast this card, exile something, draw a card, and gain life are all very desirable characteristics on a planeswalker card
702.174m: If part of a spells ability has its effect only if its gift was promised, and that part of the ability includes any targets, the spells controller chooses those targets only if the gift was promised.
There are tons of Soul Sisters variations that gain an infinite amount of life