mtg best angel commander deck Elite - Mono White - Very Powerful - Modern Legal - Custom Built - Magic The Gathering - Secret Lair's Next Commander Deck

Yes, delve can be used to pay for the generic mana on additional costs

You just need one creature to deal damage to draw and proliferate

Checks and Balances is yet another counterspell effect, but it's only in a game with three or more players and more than one player must basically agree to counterspell the third player's spell or whatnot

Cryptbreaker, for example, ignores all Eldrazi shenanigans and focuses on discarding cards to create more Zombies to fill the board

Experienced players have long since memorized the matrix of land counts for decks of 40, 60, 80 or 99 cards, but that was before we threw modal cards like these into the mix