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
His key line is simple: whenever one or more tokens you control enter, draw a card
Fun Ranking: Very Fun Baylen, the Haymaker If you want tokens, this is your commander
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