Very few artifacts allow you to tap and draw a card, with no restriction
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There are plenty of creatures that become much stronger when they can use their activated abilities multiple times, and you can also copy Maxs ability with cards like Strionic Resonator to untap multiple creatures on a turn
WotCs R&D always receives questions about when youre going to complete said cycle. As an example, we can cite the 1-mana tutors that tutor for a card and put it on top, like Vampiric Tutor, Worldly Tutor, Enlightened Tutor, and Mystical Tutor, lacking the red one
This is a pretty decent effect since it can act as both an interruption and a way to reset your opponents play
Accepting other colors gives you access to similar pillow fort cards like Ghostly Prison, Propaganda, and Sphere of Safety that stop your opponents from attacking you specifically