Kaya, Geist Hunter strikes me as something on the weaker end of playability, but its worth trying in a deck that can generate tokens
It's a ninja riding on a giant toad, which is already somewhat reminiscent of Jiraiya from Naruto
Its also useful to fog an opponents creature each turn if they insist on attacking you
For 4 mana without haste, this elemental shaman is hard in Modern, but it does draw a card with each spell if youre hellbent
And, against decks with Red targets for this, it will feel premium Ward 3 is pretty big, and for a creature this size, it may just feel like Hexproof some games, since your opponent will need a pretty hefty removal spell to deal with it in most cases, and it will be pretty hard for your opponent to ever take it down without paying at least what you paid for the Giant
The games tend to be a little faster as well, ending a turn or two sooner than your Core (Bracket 2) decks