As an additional cost to cast this spell, sacrifice a creature. Return a creature card from your graveyard to the battlefield, then return another creature card from your graveyard to your hand.
T: Add 1 to your mana pool. T, Sacrifice Ghost Quarter: Destroy target land. Its controller may search his or her library for a basic land card, put it onto the battlefield, then shuffle his or her library.
T, Sacrifice Nihil Spellbomb: Exile all cards from target player's graveyard. When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay B. If you do, draw a card.
Flying 1, Return a land you control to its owner’s hand: Create a 1/1 blue Illusion creature token with flying.
When Titania, Protector of Argoth enter the battlefield, return target land card from your graveyard to the battlefield. Whenever a land you control is put into a graveyard from the battlefield, create a 5/3 green Elemental creature token.
Target permanent you control gains hexproof and indestructible until end of turn. You gain 2 life. (A permanent with hexproof and indestructible can't be the target of spells or abilities your opponent control. Damage and effects that say "destroy" don't destroy it.)
Draw a card. You may put a land card from your hand onto the battlefield.
Whenever you draw a card, target opponent puts the top two cards of his or her library into his or her graveyard. If they're both nonland cards that share a color, repeat this process. 5U: Draw a card, then discard a card.
Whenever Riptide Entrancer deals combat damage to a player, you may sacrifice it. If you do, gain control of target creature that player controls. (This effect doesn't end at end of turn.) Morph UU (You may play this face down as a 2/2 creature for 3. Turn it face up any time for its morph cost.)
Flash (You may play this spell any time you could play an instant.) When Venser, Shaper Savant comes into play, return target spell or permanent to its owner's hand.
When Slithermuse leaves play, choose an opponent. If that player has more cards in hand than you, draw cards equal to the difference. Evoke 3U (You may play this spell for its evoke cost. If you do, it's sacrificed when it comes into play.)
Other green creatures you control get +1/+1. Other blue creatures you control get +1/+1. Untap all green and/or blue creatures you control during each other player's untap step.
T: Add C. 4, T: Proliferate (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
At the beginning of your upkeep, if you control six or more lands, put a 5/5 red Dragon creature token with flying onto the battlefield.