Tournament legality should always be your primary goal, even if you know that this is a card being done strictly as part of a collection
Thats especially true in Commander, a good home for big, flashy equipment like Argentum Armor and Hexplate Wallbreaker
For a total of 10 mana and an unblocked attack, Worldslayer will destroy everything but itself, including lands
Not to bad since it can let you follow up with another spell, which ties into the main sets expend mechanic
Whenever a Vehicle you control deals combat damage to a player, look at the top card of that player's library, then exile it face down
If the two effects are wider apart, it is common for the designer to make sure one or more elements carries over