Flying Men

Obsianus Golem

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.

Clone

You may have Clone enter as a copy of any creature on the battlefield.

Control Magic

Enchant creature
You control enchanted creature.

Urza's Bauble

{T}, Sacrifice Urza's Bauble: Look at a card at random in target player's hand. You draw a card at the beginning of the next turn's upkeep.

Mishra's Factory

{T}: Add {C}.
{1}: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.
{T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

Twiddle

You may tap or untap target artifact, creature, or land.

Colossus of Sardia

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Colossus of Sardia doesn't untap during your untap step.
{9}: Untap Colossus of Sardia. Activate only during your upkeep.

Mana Short

Tap all lands target player controls and that player loses all unspent mana.

Ancestral Recall

Sol Ring

Boomerang

Return target permanent to its owner's hand.

Clairvoyance

Look at target player's hand.
Draw a card at the beginning of the next turn's upkeep.

Serendib Efreet

Flying
At the beginning of your upkeep, Serendib Efreet deals 1 damage to you.

Prodigal Sorcerer

{T}: Prodigal Sorcerer deals 1 damage to any target.

Mana Drain

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.