Craft is not a triggered ability
You proliferate before checking for lethal damage on creatures.) Just like lifelink, proliferatelink doesn't use the stack and can't be responded to
If an activated ability of a creature you control costs no generic mana to activate (for example, if it costs , it costs, or it costs only nonmana actions such asor "Sacrifice a creature"), Training Grounds simply won't affect it
In addition to these full-art basic lands, you can find regular basic lands in Wilds of Eldraine Draft Boosters, Set Boosters, Bundles, and Commander decks
There are more black creatures than gold ones and colourless combined however this doesn't take account of the reduction in black creatures you will encounter when you are black and thus able to play Ultimate Price or Doom Blade