Traveling Chocobo is a fun addition that lets you play lands off the top of your library and can double up some triggers from the wide variety of lands the deck plays
Render Inert Drawing a card while stripping up to five counters makes Render Inert a tidy two-for-one
So, let's just Oh, and there's gotta be something in it for Khrn's controller, right
At best, I could see Harold as a sideboard card to punish control decks that tap out for a sweeper or threat, but the original dream of one-shot people out of nowhere was getting further and further away even as the list improved
When played on Turn 5, it will draw only a single card per hit (though, like Dragonlord Ojutai, it kills remarkably quickly), but in the late game, this dragon can gas back up the Blue player
The strategy of a Trostani deck is pretty straightforward: ramp up quickly, create lots of creature tokens while playing big creatures, and lean into lifegain synergies