Jinnie Fay is more of a synergy card than a generically powerful one, but Jinnie Fay puts a lot of token themes over and also just plays very well with a lot of powerful cards that happen to make tokens
(Ruby + Sapphire) Moana Born Leader and Scrooge McDuck Richest Duck in the World Starter Deck
Fly is also a solid option that works on the elf monk when playing Blue and Fifty Feet of Rope is a mana-sink Artifact that can tap an opponents creature, preventing it from un-tapping during its next untap step
It is a key component that you will have to understand thoroughly if you want to win both Limited and Constructed tournaments
Otherwise, Kykar is typically best in combo decks that will be able to take advantage of the value generated by playing a lot of spells until you can go infinite or win through a mass of 1/1s
Theyre also both lightning rods for removal spells, but if you can get them to stick, theyll create an endless supply of goodies for Captain to yoink