Mind Twist

Target player discards X cards at random.

Arcum's Astrolabe

({S} can be paid with one mana from a snow source.)
When Arcum's Astrolabe enters, draw a card.
{1}, {T}: Add one mana of any color.

Counter target spell unless its controller pays {3}.

You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.

Pack Rat's power and toughness are each equal to the number of Rats you control.
{2}{B}, Discard a card: Create a token that's a copy of Pack Rat.

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 2 life.

Target player reveals their hand. You choose a nonland card from it with mana value 3 or less. That player discards that card.