A merged creature is one permanent made of multiple spell cards When a merged creature changes zones, all the cards that make it up move together
The copyright situation is genuinely murky, the interface requires a learning curve, and the lack of automated rules enforcement puts the burden on players to stay honest
its restrictive casting cost allows the designers to give it an enormous amount of power for a five mana card
From these, we ended up with almost a complete setsave one Rare, and the rainbow or secret Raresand a full playset of most common/uncommon
Deathleaper, Terror Weapon: Flash, haste, and grants double strike to creatures that entered this turn
Original Dual Lands Original dual lands such as Underground Sea, Volcanic Island, Tropical Island, and Tundra are highly desirable because they are powerful, playable in older formats, and on the Reserved List