BPhillipYork: Really solid for mana dorks, or decks convoking things, or decks full of creatures with tapping activated abilities, however activated abilities that are good, that don't cost mana, but require tapping, are fairly rare, so it's hard to see this paying off all that cohesively unless you want to do something like use Opposition
Hollowhenge Overlord 2 I do like the flash here a lot but the six mana 4/4 and 2/2 token fall a long way shy of the Grave Titan level we like on our six mana stats cards
For Silverquil small creatures become casualties on the way to free copies of spells, and Witherbloom turns each of your creatures into a cost reducer
Others have more humble aims, like the Sleight of Mind plus circles of protection decks we all messed with in the 90s
While Natural Order is a strong card, some players may prefer to use cards like Eldritch Evolution or Green Sun's Zenith, which offer similar effects with different restrictions or benefits