It wasn't especially clear "how" this armor adhears itself to the human, so I was inspired by the specialized cells in various underwater creatures, the critters that sting and paralyze
Its more aimed at a Constructed power level, but the split between removal, recursion, and a potent pump spell gives this instant some charming coverage
It's a desert that enter tapped (booo!), taps for any color of mana a land you control could produce, and by paying 3 mana, it becomes an X/X Plant creature with reach until end of turn, where X is the highest mana value among your Commanders
How to Make The Most Out Of Flashback Flashback is a useful thing to have in almost any deck because it provides you with something inherently useful: value
From there, it's just a matter of deciding which route to go, as death triggers, for example, can be used to drain your opponents with the likes of Blood Artist