It can be proliferated, removed, doubled, accidentally knocked off the table, and so on
While Karn and Narset ended up restricted in Vintage and Teferi banned from several formats, it was the tantalizing trickster who wound up banned in Standard, Pioneer, Modern, Historic, and Legacy
Players who spend more money on their mana bases can develop faster than players who are using guildgates and Keyrunes but if we can limit the amount of spells they can play in a turn, they'll have to make tough choices and they'll be more in line with the rest of the table
I'm also big on Murmuring Bosk right now, whose existence people seem to have forgotten
Qasali Slingers Qasali Slingers is a strong source of unnatural removal in any cat deck