There aren't a ton of creatures, and the permanents that create tokens create ones with weak stats that only act as chump blockers
And if BedevilBedevil isn't enough, there are tons of great black and red removal options outside the top 10
Temur Spells: First and foremost, add some ways to make sure that Kalamax, the Stormsire can always be tapped, even if you don't have any good attacks, with vehicles like Smuggler's Copter and equipment like Whispersilk Cloak being some of the easiest options
Your characters will exert when questing for lore, activating an ability, and when challenging other exerted characters
If the player guesses incorrectly, the attacking player is able to cast it for free - otherwise they can investigate to gain a clue token
The problem with Hatchery Spider is I can see missing on occasion, and thats going to be upsetting since a 5/7 reach creature isnt exactly the most exciting thing around