Engines (Literally + Figuratively)

Seattleite wrote:Spent Energy Cask
Machine | WATER | Level 4
Once per turn, if an attack is negated, draw 1 card.
[ 1400 / 1200 ]

Intended use with Wall of Water.

This card is good, gaining benefits for negating attacks

Fallen Star
Fairy | DARK | Level 3
This card is also treated as a Spellcaster-Type Monster at all times. When this card is Normal Summoned or Flipped Face-Up, send 1 Spell or Trap card from your Deck to your Graveyard.
[ 700 / 300 ]

Intended use with Wheel of Misfortune, Geantrai, Card Replacement, etc.

If you want it as another type everywhere then you already have written correctly except take out "at all times.

Wormhole Engine
Machine | LIGHT | Level 4
Both players may Normal Summon or Set with 1 Less Tribute. Both players may Normal Summon in Face-Up Defense Position. Both players may Normal Summon or Set monsters from their Graveyard. You cannot use these effect(s) the turn this card is summoned.
[ 1200 / 1900 ]

Intended use with random tribute monsters, and Electro Lynx

You don't need the last effect as those effects are continuous not ignition, they will act within the limit.

Sea-Bound Dogfish
Fish | WATER | Level 5
When this card is destroyed, return it to the deck. Then, pick up the top 8 cards on your deck, and if there is any "Sea-Bound Dogfish" or "Sea-Bound Lemming" among them, Special Summon them. Return the rest of the cards to the deck.
[ 1750 / 2000 ]

Intended use with Fish and maybe Hydra Lurker of Darkness or Dreadscythe Warrior

Blazing Glory Diverplane
Pyro | WIND | Level 4
Your opponent must skip their Main Phase 2. If your opponent controls no Spell/Trap cards, this card cannot be destroyed. When your opponent activates or sets a Spell/Trap card from their hand, this card gains 1000 ATK and DEF, until your next End Phase.
[ 500 / 500 ]

Intended use with Surprise Vent, Tornado Zone and other WIND S/T bounce cards