Cook groups separate themselves by being a service that runs scripting for their subscribers, but given how quickly Pokemon and most big-box retailers move with upgrading their website security, I can see botting and cook groups slowly fading away
Your opponent is probably not going to waste valuable deathtouch creatures on bad blocks
Sygg, River Cutthroat might use Snapcaster Mage to recast Undermine
The short version of it is that there is a balance between how much time (read: mana, turns) one can spend accruing cards while contributing to the battlefield
It's called Garruk Relentless, and he's a planeswalker
By sitting around on a Blood Moon, youre setting yourself for a natural lock break where your opponent builds up Snow-Covered Islands and Arcums Astrolabe and Mountain-ed fetchlands, bounces your Blood Moon with Cryptic Command in the end step, and immediately has the fetch to Mystic Sanctuary to recur Cryptic Command and counter your three-mana enchantment on the way back down