mtg can a commander deck have more than 100 cards

mtg can a commander deck have more than 100 cards you use companions in and if so does it count towards the cards? Does this card allow me

Name: mtg can a commander deck have more than 100 cards you use companions in and if so does it count towards the cards? Does this card allow me
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SKU: 66447963454
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SKU: 66447963454

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What commander are you looking forward to building

The abundance of creatures in Commander games means that Vanquish the Horde will often cost a paltry two-mana, most likely leaving its caster with plenty left over to take advantage of the empty, newly vanquished battlefield

No need to bring them in for questioning yet

However, I think the bigger opportunity is that this feels like the core to a strong Boros aggro deck: Particularly with all the Heroic+Valiant in Boros