For new characters, consider assigning them a shard at creation (replacing the starting marks if necessary) so that players who aren't quite immersed in the world yet or who miss it can have their first death without being permanently gone?
And perhaps display a short tutorial/explanation of sharding after they revive from their first death, stressing points such as 'if you die twice in a row you're dead for good' and 'you can earn back the xp you lost at an accelerated rate'.
iaje and BlackSoul like this.