The expensive ones are especially playable in Commander, as the more casual format encourages big spells, and the 4-player structure slows games down
Of course this is usually up to GM discretion: the rules might *say* that an enemy force will break and run if more than 50% of their troops are killed, but if that number only gets to 51% because the pacifist cleric broke his vow and scored a critical hit while having 5 HP and defending the fallen bodies of his comrades, well, even kobolds aren't that dumb
Damn, I need to play this game
[/spoiler] [spoiler='Thunder King Rai-Oh'] While this card may seem counter-productive, it can actually help
An additional 74 digital-only vanguard avatars are available only on MTGO
While I do not know the actual risk level for MTG booster box investing, I would compare it to the riskiness of purchasing stocks