Disrupting Shoal [Ultimate Masters]

Disrupting Shoal [Ultimate Masters]Set: Ultimate Masters Type: Instant Arcane Rarity: Rare Cost: {X}{U}{U} You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost. Counter target spell if its mana value is X.

Set: Magic Player Rewards 2001 Type: Token Creature — Beast Rarity: Common When the prey in Krosa no longer satisfied them

Other creatures you control have haste

Set: Judge Gift Cards 2002 Type: Sorcery Rarity: Rare Cost: {1}{R}{R} Hammer of Bogardan deals 3 damage to any target

Kozilek's Return deals 5 damage to each creature

delighting in mischief and mayhem

Set: Commander's Arsenal Type: Artifact Rarity: Rare Cost: {2} {1}

remove a +1/+0 counter from it

{T}: Untap target attacking creature you control

"With a few minor adjustments

"The wise learn from successes as well as mistakes

Left unchecked

you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less