You use Cloud to find copies of Colossus Hammer and cheat them onto creatures with a variety of effects
The cumulative cost of all the cards in the Blue/Yellow Queen deck is at least 34,630 JPY (~US$216)
Unlimited mana isn't useful without a win condition to spend it on, and Staff of Domination allows you to draw until you find the card you need to end the game.
The dynamic lands of Zendikar may help you search for basic lands, or the harsh world of Phyrexia may have you sacrificing your nonblack creatures
First released in the Tempest set back in 1997, Slivers generally have unique abilities or effects that affect all other Sliver creatures you control and sometimes sliver creatures your opponent controls too
The main drawback is that its less effective against creatures with naturally huge toughness, but in the right deck, -X/-X effects are some of the cleanest and most versatile removal spells you can run