Ulamog's Crusher

Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents.)
Ulamog's Crusher attacks each combat if able.

Vent Sentinel

Defender
{1}{R}, {T}: Vent Sentinel deals damage to target player or planeswalker equal to the number of creatures you control with defender.

Defender
{T}: Add X mana in any combination of colors, where X is the number of creatures you control with defender.

Defender
{G}: Wall of Tanglecord gains reach until end of turn. (It can block creatures with flying.)

Lightning Bolt deals 3 damage to any target.

Defender (This creature can't attack.)
Reach (This creature can block creatures with flying.)

Defender
{T}: Target creature gains haste until end of turn.

Defender
{T}: Add {G} for each creature you control with defender.

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Rolling Thunder deals X damage divided as you choose among any number of targets.