AR (Art Rare) is the best entry point
1): Pay 800 LP, then target 1 card your opponent controls or in their GY
Once you understand the Synchro summoning aspect, it all falls into place, and you won't need to rely on drawing the best cards to be effective
While other decks can offer that simple approach, this deck shows the depth of strategy that Lorcana can offer
You are spending 3 mana (1WU) to send a spell back to the hand and keep it there next turn
Lastly, there are some assassin cards that tie into specific non-assassin themes such as Lys Alana Scarblade in elves, Goblin Assassin in goblins, Silent Assassin and Rathi Assassin in mercenaries, Unliving Psychopath in zombies or equipment decks, or Hunter of Eyeblights and Massacre Girl, Known Killer in -1/-1 counter decks