When playing heavily within a single Creature type, Kindred Charge can effectively double your power for a single turn, allowing you to make a game-ending swing with the proper timing
The new Disney Lorcana: Rise of the Floodborn set will include two Starter Decks featuring combinations of Amber/Sapphire or Amethyst/Steel and booster packs
Copy that spell for each other permanent or player the spell could target

Now, I could try to explain in my own words what that means or how they work within the rules, but that has proven dangerous in the last few weeks (did I mention that when you use a splice ability the card remains in your hand?), so instead I will refer you to the Champions of Kamigawa FAQ: Flip Cards The Champions of Kamigawa set contains ten "heroes" that are easily recognizable by their unique card frame: Akki Lavarunner -- Tok-Tok Volcano Born Budoka Gardener --Dokai, Weaver of Life Bushi Tenderfoot --Kenzo the Hardhearted Initiate of Blood --Goka the Unjust Jushi Apprentice --Tomoya the Revealer Kitsune Mystic --Autumn-Tail, Kitsune Sage Nezumi Graverobber --Nighteyes the Desecrator Nezumi Shortfang --Stabwhisker the Odious Orochi Eggwatcher --Shidako, Broodmistress Student of Elements --Tobita, Master of Winds You ignore the information on the bottom half of the card until the creature in play "flips" when certain heroic conditions are met

Artifact TARDIS Flying Whenever this Vehicle attacks, if you control a Time Lord, the next spell you cast this turn has cascade and you may planeswalk
Re-targeting a removal spell from your commander to your opponents is hilarious fun when theyre not expecting it