[Dem] An idea I had (Shift)

[Dementuo]

Shift -- Snapcast
Level 4/ATK 1800/DEF: 900/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. When your opponent activates a Spell card that involves destroying a card(s) on the field: Flip this face-down card in your Spell and Trap card zone face-up as a Quick-Play spell; negate the effect of that Spell card and destroy it, then Special Summon this card from your Spell and Trap card zone.

Shift -- Shattercast
Level 4/ATK: 1300/DEF:1900/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. When your opponent draws a card(s) outside of their Draw Phase: Flip this face-down card in your Spell and Trap card zone face-up as a Quick-Play spell; your opponent immediately sends the card(s) they drew to the Graveyard, then Special Summon this card from your Spell and Trap card zone.

Shift -- Blightcast
Level 2/ATK: 700/DEF: 900/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. When your opponent's Life Points decrease by a card effect: Flip this face-down card in your Spell and Trap card zone face-up as a Quick-Play spell; the ATK of all monsters your opponent controls become 0 and then are set in Face-Down Defense Position during the End Phase of this turn, then Special Summon this card from your Spell and Trap card zone.

Shift -- Tidecast
Level 3/ATK: 1400/DEF: 1000/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. During the End Phase of a turn that your opponent set 2 or more cards: Flip this face-down card in your Spell and Trap card zone face-up as a Quick-Play spell; destroy one card your opponent controls that was set this turn, then Special Summon this card from your Spell and Trap card zone. When this card is destroyed by battle: you can add 1 "Shift --" monster from your deck to your hand.

Shift -- Dreamcast
Level 4/ATK: 1600/DEF: 300/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. When your opponent sends a card(s) from their deck to the Graveyard: Flip this face-down card in your Spell and Trap card zone face-up as a Quick-Play spell; banish the top card of your deck, then Special Summon this card from your Spell and Trap card zone. You may play the banished card at any appropriate time.

Shift -- Psychocast
Level 4/ATK: 1900/DEF: 100/Spellcaster/Effect/EARTH
You may place this card face-down in your Spell and Trap card zone. When your opponent Special Summons a level 5 or higher monster(s): Flip this face-down card in your Spell and Trap card zone as a Quick-Play spell; the summoned monster(s) ATK becomes 0, then Special Summon this card from your Spell and Trap card zone.

Splicecasting
Continuous Spell
Once during either player's turn: You may banish 1 "Shift --" monster in your Graveyard and reveal 1 face-down "Shift --" card in your Spell and Trap card zone: The revealed card gains the banished monster's effects until the End Phase.

Recall Spellshaper
Quick-Play Spell
When a "Shift --" card in your Spell and Trap card zone is flipped face-up: target 1 "Shift --" monster in your Graveyard; place that card face-down in your Spell and Trap card zone.

Spellbreak
Normal Trap Card
When a "Shift --" card in your Spell and Trap card zone is flipped face-up or sent to the Graveyard by a card effect: Target one card on your opponent's side of the field; destroy that target.

Countermorph
Counter Trap Card
Send one "Shift --" card in your Spell and Trap card zone to the Graveyard; negate the activation of an opponent's Spell or Trap card and destroy it.

Rate, hate, comment, whatever. I'm open to ideas for further support if you guys care to share them.

[Ｄｈａｒｃ]

Lol'd at "Dreamcast".

Anyway, these are actually very good. I enjoy their effects very much. Kinda puts a different spin on things. They work very well for when you both want more monsters and the effects of some Spell/Trap Cards. Plus, they all have good synergy, and a deck based around these wouldn't be all that bad.
Nice work, bro.