Silvers Rayleigh, who was the right hand of the Pirate King finally joins the battle
so, for example, you can have four copies of Glimmora ex, as seen above, regardless of what set its from, whether or not its attacks or abilities are the same, or whether its art is the same from card to card
If one of these lands is entering at the same time as a "shock land" (a cycle of lands originally from Ravnica block that allow you to pay life or have them enter tapped), use the life totals of all players before choices are made for that shock land's replacement effect to determine whether the land enters tapped
The simplest answer is that there is no simple answer
On the other hand, Mew Ex can "steal" the biggest attack on the opponent's board with Genome Hacking, making it a great counter to hard-hitting decks