You only want 1-3 per list, usually on the lower end of that range
Penmanship: There may be obvious irregularities, such as shaky letters or inconsistent pressure
Moves like Monty's 'Leg Stand', or Rocky's 'Blood Feud' - which references an "ongoing feud with an orange neighbour cat" - certainly give a sense of each animal's personality
For just 1 mana, you can destroy an artifact or enchantment, or even proliferate to add counters to any number of permanents or players
By reducing the cost of instants and sorceries by up to four, while also giving sorcery spells flash, Wizards of Thay can open the doors to a vast number of synergies capable of annihilating your opponents
Why would I want to do that? Illustrated by Magali Villeneuve Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp