Otawara, Soaring City Otawara, Soaring Citys bounce ability can be nice for stalling opponents or putting one of your own cards back in your hand
In addition to hero support, I leaned a little into +1/+1 counter synergies
Agent's Toolkit Alchemist's Vial Altar of the Wretched Architects of Will Arcum's Astrolabe Assassin Gauntlet Autograph Book Baleful Strix Barbed Servitor Bladecoil Serpent Blood Fountain Blood Servitor Bomat Bazaar Barge Brass's Tunnel-Grinder Buzzing Whack-a-Doodle Candy Trail Canoptek Spyder Circuit Mender Clockwork Servant Combat Thresher Cryogen Relic Detective's Satchel Detention Chariot Dragon's Hoard Dungeoneer's Pack Elsewhere Flask Energy Refractor Eye of Vecna Filigree Familiar Five Hundred Year Diary Glassdust Hulk Gleaming Geardrake Glimmer Lens Golden Egg Guild Globe H.E.R.B.I.E
But I decided that I wanted to keep the Vow count high to combo with Karona and besides, they still work as psuedo-removal on your opponents creatures
Once on the battlefield, it can be very painful for your opponent to use removal on your humans, as they get drained every timea human dies
Make the best choice for your needs and join the community of players who have already succumbed to the call of Rise of the floodborn