Howling Mine

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

Counterspell

Spell Blast

Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)

Millstone

Wall of Air

Defender, flying (This creature can't attack, and it can block creatures with flying.)

Island

Wall of Water

Defender (This creature can't attack.)
{U}: This creature gets +1/+0 until end of turn.

Power Sink

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.