Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)
Even better, Sword of Wealth and Power makes a Treasure token when the equipped creature deals combat damage to a player, and then you get to copy the next spell you cast this turn
If none were, the ability won't trigger at all
That being said, this merger means that CGC Cards will be focusing on a lot more than just TCGs like Magic
If it's a nonland card, create a 2/2 black Rogue creature token