The keyword is no longer in use, but it's made some appearances in Master Editions and fun sets like Unhinged
In terms of splashes: we now need Blue on turn one for our enablers, but also sometimes black if we want to cast Darkblast or discard spells from the sideboard, or white if Portable Hole is needed
This can really upset how your opponent curves and can easily cause them to take a load of free damage or fail to safely deploy a planeswalker of their own
The contingency of opponents having less life in the player youre attacking can get in the way, but if the game circumstances create a valid trigger, this black enchantment gives your commander deathtouch and indestructible until end of turn
This is another one that will be horribly underdrafted in the early days of Gatecrash draft
There's a connection, but would that really be enough to warrant giving out a whole die