I've watched Peter Parker go through trials and tribulations, reach the heights of personal success, and then go back to square one many, many times
Obviously you need to be in a combat focused deck for this one, but if you are I see little reason why you wouldn't cram this in if your manabase can warrant a few taplands
Legality depends on the tournament format -- Legendary Sword can be legal in some formats and banned or restricted in others
Canopy Lands Kickstarted by Horizon Canopy in Future Sight well before more canopy lands/horizon lands appeared, these are solid cards you dont want too many of
But any creatures, lands, artifacts, enchantments, planeswalkers or battles you have in play are all permanents, even if some of them are tokens (see below)
Takahashi knocked it out of the park with the design of this card if he was looking for it to have an impact on the game