Striped Riverwinder [Hour of Devastation] Shadows over Innistrad Set: Mirrodin Type: Creature —

Set: Mirrodin Type: Creature — Vedalken Wizard Rarity: Rare Cost: {2}{U}{U} Whenever you cast an artifact spell

This effect doesn't remove Green Ward

Grafwidow enters the battlefield

tap all lands that player controls that could produce any type of mana that land could produce

Whenever a player casts a spell

Striped Riverwinder [Hour of Devastation] Shadows over Innistrad Set: Mirrodin Type: Creature —Set: Hour of Devastation Type: Creature Serpent Rarity: Common Cost: {6}{U} Hexproof (This creature can't be the target of spells or abilities your opponents control.) Cycling {U} ({U}, Discard this card: Draw a card.) The denizens of the Luxa River woke angry on the currents of blood.