Legality depends on the tournament format -- Pilot Token can be legal in some formats and banned or restricted in others
When put into formats where Lightning Bolt exists, this cards a bit less useful due to its inconsistency
Beyond making creatures stronger, other tribal effects might give you a bonus or ability that scales based on the number of creatures in play, like [mtg_card]Wellwisher[/mtg_card] or [mtg_card]Graveborn Muse[/mtg_card]
Vampiric Tutor, Rare (With a shout out to Enlightened Tutor, Mystical Tutor and Worldly Tutor - all Uncommons) There is just one card that has ever been printed that could, arguably, be in the same conversation as Demonic Tutor
Probably not surprising it has been a staple for years in all 3 Eternal formats Modern, Legacy and Vintage
This card generates massive card advantage when overloaded, destroying all unfriendly artifacts in one fell swoop (especially in Commander)