More than combo or aggressive decks with toolboxes, you'll most often see this in control decks that sport a toolbox
You can have more, but I recommend sticking as close to 40 cards as possible while aiming for a ratio of 24 playable cards to 16 lands, adjusting for your curve as you see fit
This may mean that were about to be inundated with spoilers over the coming weeks, on top of the already announced spoiler season for The Hobbit
Lastly they are pretty nasty to get countered and you really don't want to have to worry about your support stuff getting countered in a way that can ruin you
READ MORE: Wizards of the Coast Issues Surprise Banning For Standard 2022 Cunning Rhetoric ~$3.75 The next card is Cunning Rhetoric, which is an enchantment that can makes our opponents question whether or not they want to attack us
It wasn't that long ago that most combo decks were built around spells (think Storm and Ad Nauseam), but now, many combos are creature-based, like Melira, Sylvok Outcast and Kitchen Finks or Devoted Druid and Vizier of Remedies