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Nezahal is a creature with a similar ability (no one will ever pay the four for Mystic Remora, btw and that's OK) albeit on a very expensive creature, so it really lags in comparison

Also, why not just do your own 30 seconds research for an article like this

Time Thief Power Reserve is a Continuous Trap Card that can Special Summon itself as a Normal Monster before also Special Summoning a Machine Time Thief monster from the hand, deck or graveyard

Yeah, but I couldn't think of any other type of card that could be used as a near inexhaustible resource, while also being a nuisance to the opponent

There has been an increasing number of Named Tokens too