Sigil

Sigil is an abstract strategy dueling game. Place stones to surround and crush opposing pieces. A board of Sigil is populated by 9 random spells. If you fully control a spell, you may sacrifice your stones in it for a powerful effect. A game of Sigil ends either when one player has a 3-stone advantage, or when either player casts their 6th spell. Whoever has the most stones wins. -description from publisher