Atlas ability to turn mana investments into huge threats lets you cheat out your biggest dinosaurs for a fraction of the cost
Life is a resource in Magic: The Gathering, like anything else, so be sure to spend it if you feel like it will draw you into your game-winning card or combo
Legality depends on the tournament format -- Human Token // Wolf Token can be legal in some formats and banned or restricted in others
Such swift ramp is invaluable, especially in mono-white, where efficient mana utilization can dictate the pace of the game, and ramp is much harder to come by than say, green or black
Do you think your deck is optimized for cost reduction
If a player is instructed to put a card into their graveyard from their library without using the word "mill," (by the effect of Rowan's Grim Search from Wilds of Eldraine , for example), that card isn't a legal target for Tato Farmer's last ability