Keyword: Cycling

Starstorm deals X damage to each creature.
Cycling (, Discard this card: Draw a card.)

All creatures gain fear until end of turn. (They can’t be blocked except by artifact creatures and/or black creatures.)
Cycling (, Discard this card: Draw a card.)
When you cycle Dirge of Dread, you may have target creature gain fear until end of turn.

Mountaincycling , forestcycling (, Discard this card: Search your library for a Mountain or Forest card, reveal it, put it into your hand, then shuffle.)

Cycling (, Discard this card: Draw a card.)
When you cycle Krosan Tusker, you may search your library for a basic land card, reveal that card, put it into your hand, then shuffle. (Do this before you draw.)

Mountaincycling , forestcycling (, Discard this card: Search your library for a Mountain or Forest card, reveal it, put it into your hand, then shuffle.)

Target player loses 4 life and you gain 4 life.
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Destroy all creatures. They can’t be regenerated. Draw a card for each creature destroyed this way.
Cycling (, Discard this card: Draw a card.)
When you cycle Decree of Pain, all creatures get -2/-2 until end of turn.

Lonely Sandbar enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Tranquil Thicket enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Forgotten Cave enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Barren Moor enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling (, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Haste
Swampcycling , mountaincycling (, Discard this card: Search your library for a Swamp or Mountain card, reveal it, put it into your hand, then shuffle.)

Fear (This creature can’t be blocked except by artifact creatures and/or black creatures.)
Islandcycling , swampcycling (, Discard this card: Search your library for an Island or Swamp card, reveal it, put it into your hand, then shuffle.)

Target player gains 8 life.
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

: Add .
Forestcycling (, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)

Barren Moor enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Slipstream Eel can’t attack unless defending player controls an Island.
Cycling (, Discard this card: Draw a card.)

Destroy all artifacts, creatures, and enchantments.
Cycling (, Discard this card: Draw a card.)

Mountaincycling , forestcycling (, Discard this card: Search your library for a Mountain or Forest card, reveal it, put it into your hand, then shuffle.)

Tranquil Thicket enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

Forgotten Cave enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)

: Chartooth Cougar gets +1/+0 until end of turn.
Mountaincycling (, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Secluded Steppe enters tapped.
: Add .
Cycling (, Discard this card: Draw a card.)