mtg how much land in a 60 card deck Simic Adapt - Green Blue - Modern Legal - Custom Built - Magic The Gathering - How To Build A Magic:

Whirler Rogue Creature Human Rogue Artificer When this creature enters, create two 1/1 colorless Thopter artifact creature tokens with flying

As far as Magic Arena goes, there isn't really a way to get the deck cheaper than eight rares and four mythics since Dorothea, Vengeful Victim, Katilda, Dawnhart Martyr, and Hallowed Haunting are the foundations of the deck, although turning a rare dual land into Evolving Wilds does help with the cost a bit there as well

This card gives a creature +0/-9,999 which, unless something very strange has happened, is going to kill pretty much anything

Heartless Hidetsugu does insane amounts of damage, and if you have more life than your opponents the ability will essentially double your lead

Its a cheap and efficient way to dig into your deck and manipulate how the next few turns will unfold, and for more convoluted spellslinging strategy, playing cheap spells is the entire strategy