The inclusion of alternate win conditions means you can build towards a win that your opponents won't see coming
Lands that enter under a player's control due to effects other than taking the special action of playing a land won't cause Horn of Greed's ability to trigger
Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45
Since it works for every opponent, if Smothering Tithe isnt killed on sight, its controller gets 3-4 more mana each turn
But the snake tokens often end your opponents faster than they can use them, especially with the aid of red cards like Shared Animosity and Purphoros, God of the Forge
Flawless Maneuver As far as free spells go, Flawless Maneuver is relatively tame, especially when compared to other cards in its cycle like Fierce Guardianship and Deflecting Swat