If you're already in the Undercity dungeon, then cards that read venture into the dungeon will instead progress you to the next room in the Undercity as opposed to having you enter another dungeon
The first is you make a cool design and either turn it into a character or happen to find a character that's a great fit for it
Magic Online might be ugly and buggy, but it does more or less do its job
Shadowborn Demon Shadowborn Demon is a pushed 5/6 flier for 5 mana that also kills a creature when it enters
You can't choose more than X targets, and each chosen target must receive at least 1 damage
Just like Path to Exile, it's actually card disadvantage, (you trade your card to exile/destroy one of theirs and they get a land - total cards - You lost 1, they lost 1, and gained one, for a net of 1 card their way)