When this creature's power is 7 or greater, sacrifice it. Exile the top card of your library: Put X +1/+1 counters on this creature, where X is the exiled card's mana value.
{3}: If your library has ten or more cards in it, target opponent looks at the top ten cards of your library and separates them into two face-down piles. Exile one of those piles. Search the other pile for a card, put it into your hand, then shuffle the rest of that pile into your library.
{T}, Sacrifice this artifact: Return all Auras attached to target permanent you own to their owners' hands. Draw a card at the beginning of the next turn's upkeep.
If this land would enter, sacrifice an untapped Mountain instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {C}{R}. {1}, {T}: This land deals 1 damage to target attacking creature.
If this land would enter, sacrifice a Forest instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {G}. {T}: Target creature gets +1/+1 until end of turn.
If this land would enter, sacrifice a Plains instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {W}. {1}{W}, {T}: Create a 1/1 white Soldier creature token.
If this land would enter, sacrifice a Swamp instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {B}. {T}, Sacrifice a Swamp: Add {B}{B}{B}{B}.
If this land would enter, instead sacrifice each other permanent named Sheltered Valley you control, then put this land onto the battlefield. At the beginning of your upkeep, if you control three or fewer lands, you gain 1 life. {T}: Add {C}.
If this land would enter, sacrifice an untapped Island instead. If you do, put this land onto the battlefield. If you don't, put it into its owner's graveyard. {T}: Add {C}{U}. {1}, {T}: Scry 1.
This land enters tapped. {1}, {T}: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Return this land to its owner's hand at the beginning of the next cleanup step.