These can be a specific type of ability the monster has (Flip, Spirit, Union, Gemini, Tuner, Pendulum), or indicate that the card needs to be Special Summoned in a specific way (Ritual, Fusion, Synchro, Xyz, Link)
The missing three are the Dimir mechanic Cipher, deemed a bit too weak for Limited
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Now I realize your budget may have been a bit broken by purchasing that new Liliana you've been waiting for, so I've got just the list of removal spells that won't break your bank, but can still tangle with anything your opponents are throwing down
A few other effects benefit you greatly for widespread devotion in Bloom Tender, Conqueror's Flail, and Faeburrow Elder