Cloudpost

When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card. When this creature leaves the battlefield, return the exiled card to its owner's hand.

Creatures can't attack you unless their controller pays 2 for each creature they control that's attacking you.

T: Add one mana of any color. Spend this mana only to cast a creature spell.

Haste (This creature can attack and T as soon as it comes under your control.) Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

When this creature enters, draw a card.

When this creature enters, it deals damage to target player equal to the number of nonbasic lands that player controls. Unearth 5BR (5BR: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Destroy target artifact or enchantment.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.) 1, Sacrifice this creature: Destroy target artifact or enchantment.