The process varies by event
Time Sieve is another strong addition, especially with Myr Battlesphere or other token generators
Urza is a singular win condition for the decks that can play him, capable of stabilizing a players life total, drawing additional cards, removing opposing cards under opponents control, creating creatures, and even generating virtual mana by making additional artifacts cheaper to play
The best thing about Yuriko is, as long as you have an unblocked creature, you can always get her into play for two mana
Because I've been hands-on with the game for a while now (you can check out what I think in my Disney Lorcana first impressions piece), I've got some advice on which of the Disney Lorcana starter decks will suit you below