I am challenging myself to build a 60 card deck that consistently plays Denizen of the Deep. Really, you could replace this with any "timmy card", though.
I know this isn't a stellar card, but I like the art and I think there's an opportunity (that I don't see) to abuse it's drawback.
I've thought about Oath of Druids, but that really limits me to having only Denizen of the Deep as a creature, and only having one in play at a time, which could get me overwhelmed. Likewise, I feel that Defense of the Heart puts me in a similar situation, where I am relying on stifle, Torpor Orb, or hushbringer to even survive - but that now requires me to have a lot of components out.
I've thought also about the Manifest/cloak mechanics, which can be fun since in theory I could have multiple in play - but it's not reliable enough. I can play Vannifar, Evolved Enigma and scroll of fate, but I don't have a reliable way to flip the creature without splashing a third color, or also using Ixidor, reality sculptor - which would be three cards that I can't pull off until turn 6.
I think I could also use Quest for Ula's Temple - but this doesn't seem reliable. I need it in my opening hand, and then I have to manipulate my deck for the next three turns. And finally, there's show and tell - but I would almost always be at the disadvantage compared to my opponent in that situation.
Please let me know if you can think up any schemes that might help cards like this show up more often.