Green Sun's Zenith [Mirrodin Besieged] Land Creatures can't attack you unless

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you

except it has "At the beginning of your upkeep

you may draw a card unless that player pays {1}

" —The Underworld Cookbook

Set: Legends Type: Artifact Rarity: Rare Cost: {6} At the beginning of your upkeep

Green Sun's Zenith [Mirrodin Besieged] Land Creatures can't attack you unlessSet: Mirrodin Besieged Type: Sorcery Rarity: Rare Cost: {X}{G} Search your library for a green creature card with converted mana cost X or less, put it onto the battlefield, then shuffle your library. Shuffle Green Sun's Zenith into its owner's library. As the green sun crowned, Phyrexian prophecies glowed on the Tree of Tales.