The deck is built using counters, and it has other proliferating cards in it
I want to talk about the cards individually as candidates for putting into your Commander decks or maybe even building around
For example, Poison Dart Frog is a creature, and its subtype is the creature type Frog
The good news is that in the right deck, Unpredictable Cyclone is still very powerful when played fairly, allowing you to cast expensive spells for just the one or two mana it costs to cycle a card while also getting around normal timing restrictions by allowing you to cast creatures and sorceries during your opponent's turn (if you cycle into them)
The Fertile Lands of SaulviniaThe Fertile Lands of Saulvinia doubles all mana production from lands that make colored mana (Temple of the False GodTemple of the False God weeps)
The Grixis color identity of black, blue, and red has access to some of the best card draw effects, great control options, and stellar removal