If you do choose a target, and that target becomes illegal, Waxing Moon is countered, and your creatures wont gain trample
ST24 Green Jewelry Bonney ST19 Smoker I usually rank Black Smoker higher since the Leader has an effect that synergizes with your removal cards, reducing the cost of an opponents Character to help put it in range for your KO effect
You can set up these triggers however you like, so if you want to have a few token Merfolk you have lying around try and power through your lands you can, while giving Hakbal and your other creatures the +1/+1 counter when you explore a nonland card
With such a perfect curve-out, you can only reach six ink on the play before running out of cards
Thassas Oracle ($9 for the regular nonfoil up to $75 for the Foil Extended Art version) The most popular card from Theros for Commander, I imagine this is taking a lot of cEDH attention but its a solid plan to back up Laboratory Maniac and Jace, Wielder of Mysteries
This set drastically lowered the barrier to entry for competitive play by re-introducing hard-to-find, expensive staples (like the 10-cost Doflamingo and Katakuri) back into the market in massive numbers