Secret paladin used to be dominant in wild, and although I did hate it, I admit that it was a surprisingly effective deck against the meta back then. It's back in standard now, and it's 100% less cancerous. Here's my take on the deck.
Basically, this deck combines the playstyle of Divine Aggro paladin with Dragon Eggs and Mysterious Challenger. The early game involves generating tokens and buffing them with cards like Blessing of Kings, Keeper of Uldaman and Abusive Sergeant. Also, Rallying Blade can be used in conjunction with Steward of Darkshire in order to generate tremendous value. The late game basically involves using Mysterious Challenger and cards like Competitive Spirit to win the game.
Generally, this deck has a very strong earlygame with many 1-2 drops, which can then be buffed during the midgame in order to create favourable trades. The late game relies on Mysterious Challenger and secrets like Competitive Spirit to close out the game.
Mulligan for 1-2 drop MINIONS, even with coin. Do not keep any spells in your starting hand, unless you are confident of your earlygame.
TLDR, Divine Aggro paladin with Dragon Eggs and Secrets. Have fun.