In MTG Standard a deck can only contain a max of four of the same type of card, and singleton formats like Commander only allow for one of each card
Strong lands to craft for an enduring collection include the surveil lands from Murders at Karlov Manor, the fetch lands from Khans of Tarkir , and the shock lands from Guilds of Ravnica and Ravnica Allegiance
Wizards of the Coast has obviously chosen carefully for FF
Once Dragalge EX is set up with 2 Energy, it attacks with 80 DMG, poisons to add 10 extra damage (30 with 2x Nihilego), and another 20 DMG from Darkrai EX
Unless the combo is gaining life, odds are they aren't going to be able to complete it without burning themselves to a loss
But somewhere between Stronghold and Ravnica, we all collectively realized that the graveyard is actually just a second hand thats slightly harder to organize