Unlike Cavern of Souls, Delighted Halfling can be tapped for any mana to cast any legendary artifact, legendary enchantment, and even legendary sorcery spell like Karn's Temporal Sundering
That's in contrast to non-permanent spells, which are limited to instants and sorceries
Creature Artifact - Human Soldier Color tag templates(None) Keeper of the Accord At the beginning of each opponent's end step, if that player controls more creatures than you, create a 1/1 white Soldier creature token
This is fine filler if you have enough cheap attackers but only because it is a powerful card
This card needs to be in an aggressive build, but I believe it has some value in certain situations
If not, than the Empoleon player will be able to relentlessly use Diving Draw to setup multiple Empoleon and eventually take the game from you