(: Add or to your mana pool.)
Obsidian Coliseum enters the battlefield tapped unless you control four or more Wizards.
, , Sacrifice Obsidian Coliseum: Target player draws two cards, then discards two cards.
: Add 
or 
to your mana pool.), , Sacrifice Obsidian Coliseum: Target player draws two cards, then discards two cards.
