Each player is given a hand of monster cards and must role a Summoning Die to see if they can summon a monster and move along the board
You could end up stealing something good for seven mana if, for some reason, your opponent plays their bomb into your on-board trick, but most smart opponents will make sure to have a couple of bad creatures around for Riches fodder, which likely makes the average value not much greater than the 3/3 land you get from Rising Miasma
If you lose the flip, sacrifice that creature
Sultai Non-dragon Commander: Kotis, Sibsig Champion, Legendary Creature - Zombie Warrior
This led to a plethora of control cards being printed with utility effects that punished the opponent for incorrectly planning around the board state
Eluge, the Shoreless Sea Eluge, the Shoreless Sea is fun to build around because it scales linearly with the game and the number of lands you control