Here are my custom cards. They're meant to be legacy support for the Gradius monsters, hence all the "LIGHT Machine-type monsters you control with 1200 or less ATK", rather than just "Deepspace". (I hope this is the right place to post them...)
Deepspace Scout
Level 4
Light
Machine/Effect
When this card destroys a monster by battle, you can target one card your opponent controls: Destroy that target. When this card is Summoned, you can Special Summon one LIGHT Machine-type monster with 1200 or less ATK from your hand or Graveyard, except “Deepspace Scout”.
1200/800
Deepspace Stunner
Level 4
Light
Machine/Effect
Once per turn, this card cannot be destroyed by battle. When this card destroys a monster by battle, during the rest of this turn, your opponent cannot activate cards or effects.
1200/900
Deepspace Berserker
Level 4
Light
Machine/Effect
This card gains 300 ATK for each LIGHT Machine-type monster with 1200 or less ATK you control. When this card destroys a monster by battle, you can add one LIGHT Machine-type monster with 1200 or less ATK from your Deck to your hand. This card is always treated as having 1200 or less ATK for the purposes of effects you control.
1200/0
Deepspace Infiltrator
Level 4
Light
Machine/Effect
When this card destroys a monster by battle or inflicts damage via a direct attack, your opponent loses 600 Life Points. This card can attack directly.
1200/100
Deepspace Suffocator
Level 4
Light
Machine/Effect
When this card destroys a monster by battle, you can reduce the ATK of a monster your opponent controls by 200 times the number of LIGHT Machine-type monsters with 1200 or less ATK you control. During each Standby Phase, all monsters your opponent controls lose 300 ATK. When a monster reaches 0 ATK while this card is face-up on the field, it is sent to the Graveyard.
1200/1000
Deepspace Beacon
Normal Spell
Add one LIGHT Machine-type monster with 1200 or less ATK from your Deck to your hand. If your opponent controls at least 2 more monsters than you, you may Special Summon one LIGHT Machine-type monster with 1200 or less ATK from your Deck instead.
The Depths of Space
Field Spell
Once per turn, you may target one LIGHT Machine-type monster with 1200 or less ATK you control: when it destroys a monster by battle this turn, if its effect activates and resolves, you may resolve that monster's effect twice. (This does not require that monster to destroy a monster in battle again that turn.) All face-up LIGHT Machine-type monsters with 1200 or less ATK you control gain 400 ATK and DEF, and are treated as having 1200 or less ATK for the purposes of effects you control.
Honest is gonna love these...