Hearthpwn

Simplified somewhat from my original Obvious Ooze, which ironically had some very non-obvious rules interactions with Auto-Attack and required a wordy feature that was almost, but not quite, Poisonous. This has a number of lines of play associated with it (and available against it), but uses more "normal" concepts. Also, thematically updated to be at home in Un'goro.

• Maelstrom Dragon: Fine card, seems out of place for paladin, which doesn't do elemental flavored effects nor board sweeps. This is a Shaman card.
• Abraxas the Argent Dragon: Defensive play in the late mid game, which I gather is out of favor. Similar role to my card, but goes about costing / effect pacing differently.
• Mother of Dragons: Nontargeted spell immunity is clever. The blatant GoT flavor isn't cool, though.
• Wyvernstride Dragoon: Strong early play. Weapon synergy. Limited form of Charge on the weapon prevents grotesque OTK. seems good.
• Wyrmrest Knight: Feels slow. You have to win the Joust, then draw into the discount card. I never thought I'd say this, but I wish this effect was Inspire instead (note that it would have diminishing returns as you hit the same card).
• Holy Serpent: Infinite value, auto completes IYHAD effects, but 1 Health keeps it under control? Excellent.
• Viperus, the Dragon Paladin: Win more card. Needs a really strong board state to avoid being blank, then turns you into Justice Warrior? Pass.
• Kidnap the Princess: Despite evidence to the contrary, unilateral mind control is supposed to be a Priest exclusive. This is also 4 mana discounted from the Priest base staple. Just too good and too far off the color wheel.
• Neltharion, Redeemed: Ignore the Aspects flavor. This is 5 2/2s for 10 mana, plus Ysera Dream cards. That's probably fine with different fluff, but 2/2 Dragon Aspects is too weird for me to back.
• Dragonsword: Hand buffing weapon? Sure. I wonder if the wording wouldn't be "each Dragon" rather than "all Dragons", but seems fine enough.
• Snack Time!: Buffs are disfavored in the meta, but my problem is really that feeding your squire to random dragons on purpose doesn't feel like a paladin effect.
• Hallowing of Draenor: Had prepped a long discussion of this math. Deleted it, because no one wants that. 9 times out of 10, this is far inferior to Emperor Thaurissan. Needed better ability to live a turn. Or something.
• Nightbane Giant: Not flashy,but fits with the rest of the giants. I wonder if most games will see enough Dragons to lower his cost to the point where blank stats are worth the play, though?
• Death Breath: Seems appropriate for paladin Secret. Plays off the tribe. Retribution flavor. I like this one.
• Rebuke: Feels like it encroaches too much on Mage themes. Probably too strong an effect as written for the Secret cost slot.
• Dragon Muse: I don't think this text works as written. That aside, not really any dragon synergy, and silly broken if you drop a hand of super cheap sploof after casting.

• Dragonkeeper: Seems okay in zoo, but slots there for non Tribal minions are limited, and I'm not sure this would make the cut.
• Swift Whelp: In a faster Tribe, broken. For Dragons, forces some needed board presence early. Mandatory play is a drawback in some cases. I like this.
• Vial of the Sands: Much text to make a random minion in hand gain the Dragon Tribe. Too complex as written, and a weak effect anyway.
• Purify with Dragonfire: Even a Faerie Dragon makes this so 3 to all enemies, including face. Horrifying with bigger targets. Simply too strong.
• Sunwalker Dezco: Not submitted with a paladin frame. :(
• Fist of Wrathion: Interesting, but feels too slow. Is this your T5 drop, after you have likely drawn at least a couple of the primary targets? I think with a different stat line and a 3 cost, this would have a future.
• Dragonscale Warden: I think the wording gets you one 4/4 with DS + one 4/4 without DS, and I think that's still too good for 5 mana.
• Alexstrasza, Life-Giver: Seems in theme, decent costing, gives you back 6 and cleans up nonlethal damage on your other big dragons. I have no problem with this.
• Time Will Tell: Global board Adapt feels more like a Druid or Shaman approach. Paladin theme might hit hand or might hit one or more targets via Secret. 
• Hidden Hatchery: I like Death Breath on page 1 better, unless we assume some more Dragon support gets printed. For better or worse, this easily is a board filler.
• Nozdormu, Lord of Time: I think the full cycle is too slow for an already slow Tribe. But my real problem is that I think this is best without other Dragons in something like N'Zoth paladin, and that's a problem for meeting the weekly theme.
• By the Holy Flight: I don't have any concrete objections here, but this just doesn't feel like it would make a cut.
• Gimnir of the Wyrmrest: I can't imagine this living long, but providing cover to your deck engine is welcome.
• Keeper of the Sanctum: Justicar makes the HP two 1/1s. This is one 2/2, which is arguably better. I think it should replace the power rather than add to it (also, adding to it is a rules mess in combination with other ways to swap out your power).
• Unlikely Allies: Love the concept. But I'm concerned that murloc paladin will run a small number of dragons and use this to tutor up the whole toolbox. For that matter, if the only Dragon is Ysera, this says "2 mana: Draw Ysera if you control a murloc", and that feels like it might be too good.