Token creature creation benefits the alliance mechanic in general, with a card like Gala Greeters getting max potential if you can create enough bodies each turn
Sacrifice after V.) I, II, III, IV Create three 2/2 white Knight creature tokens
Lozhan, Dragons' Legacy gives you a few options of how to trigger its ability, allowing you to mix adventure with dragons to make a two-themed deck out of the card types
You can only use this effect of "Slushy" once per turn
My favorite bit of secret tech revealed by EDHREC is Wellsprings use in Yenna, Redtooth Regent decks, a card that can just sit there and make copies of Wellspring until everyone has to give you all their lands on your turn
Thoughtseize in because taking 2 damage from it is better than 34 damage from a burn spell