Though she has a cost of 7 Ink, Clarabelle is a Floodborn character, which means that she has the Shift keyword, allowing her to be played directly on top of another Clarabelle card, for a reduced cost (in a manner reminiscent of how evolving works in Pokemon)
If you use a Mega Pokemon and get your shit kicked in, you deserve to lose #11 Mega Gyarados is definitely the best of the three shown here
If a creature spell has kicker or multikicker and another ability that checks if it was kicked (such as Bog Badger or Phyrexian Missionary), that ability is linked to its own printed kicker or multikicker ability and will apply only if you paid its own kicker or multikicker cost
And, of course, the more lore the better
You can just feel the Dungeons & Dragons influence here, which Garfield does credit (Wizards of the Coast would later acquire the brand)