Shatterskull Smashing // Shatterskull, the Hammer Pass

Sorcery // Land · {X}{R}{R}

Shatterskull Smashing deals X damage divided as you choose among up to two target creatures and/or planeswalkers. If X is 6 or more, Shatterskull Smashing deals twice X damage divided as you choose among them instead. // As this land enters, you may pay 3 life. If you don't, it enters tapped.
{T}: Add {R}.