But what were really here for is that draw ability
Alloy Myr, Altar of the Pantheon, Bonders Ornament, Chromatic Lantern, Coalition Relic, Cultivators Caravan, Darksteel Citadel, Dragons Hoard, Elementalists Palette, Foreboding Statue, Fountain of Ichor, Honored Heirloom, Letter of Acceptance, Mana Geode, Manalith, Network Terminal, Opaline Unicorn, Phyrexian Lens, Replicating Ring, Scuttlemutt, Skyclave Relic, Spinning Wheel, The Celestus, and Vessel of Endless Rest all outclass Celestial Prism in this way
You don't need to attack with Hakbal, but when you do you'll be able to put a land from your hand onto the battlefield
So having decided, and getting approval to do this - how are we going to rate these creatures
Running Eldrazi Temple is a much more serious cost than simply playing Magic