Chain Reaction is extremely situational , dealing damage to each creature equal to the number of creatures in play for four mana
You may exile a creature card from among them
The fact that it costs eight mana also hardly seems like a concern, given how easily green can pull ahead of other colors with land ramp and mana dorks
In fact, this card is perfect for setting up XYZ summons: Simply special summon a level 2 monster off of this effect, and youve got an instant rank 2 monster on your hands
With "Pyramid of Light" removed from the field, the souls of Yugi, Joey, Tristan, and Ta are returned to their bodies and Anubis's "Andro Sphinx" and "Sphinx Teleia" are destroyed
It gains trample until end of turn