The value of X is determined only as Bag End Porter's triggered ability resolves
(2019-06-14) If the top card of your library is a land, you may play that land only if you have any available land plays
However, alterations like black-painted edges or similar modifications are strictly not allowed
A brand new MTG Secret Lair has been announced at MagicCon Atlanta featuring, for some reason, Dwight Schrute from The Office
Thanks to a more recent release date, Team Rocket's Zapdos is likely to switch places with Hop's Snorlax, as it's more likely to fall before an eventual rebound
(You still pay any additional costs.) If you wish to cast your commander without paying its mana cost, you must cast it while the triggered ability of Geode Golem is resolving