This is my IRL D-Reaper deck. I thought it was more fun to make a pure D-Reaper build. I see some builds use memory setting tamers and yellow option cards like BT05 Spiral Masquerade. While these builds of the deck may be more optimized, I thought it was more fun to run a pure D-Reaper build.
The core of this deck is stacking Mother D-Reaper with a big stack of ADR-02 Searcher under it using Mother D-Reaper's once per turn ability. To further the deck's goal ADR-01 Jeri and ADR-04 Bubbles can let you attatch more than one ADR-02 Searcher per turn. Since ADR-02 Searcher can be played for 1 memory if you don't have a searcher on the field, playing it allows you to both draw a card and can choke your opponent by leaving them with 1 memory.
Ideally you would want to focus on accelerating ADR-02 Searcher, however the unfortant part of card games is that your opponent gets to play cards too. ADR-07 Palates Head, ADR-06 Horn Striker, and ADR-05 Creep Hands all play a bit more of a situational role in the deck. ADR-07 Palates Head can remove threats or annoying blockers in the later game that stops your OTK. ADR-06 Horn Striker can be used to chip down your opponent if you don't want to risk your Reaper to any option cards in security. ADR-05 Creep Hands is my main way of stopping my opponent from taking out my security before I do the same to them.
All of this work to accelerate ADR-02 Searcher has the payoff of Reaper. Once you have seven ADR-02 Searcher under Mother D-Reaper you can play Reaper for 0 and then attempt to OTK using Reaper's many attacks.