Yu-Gi-Oh! MASTER DUEL

This achievement is fairly straightforward in that it requires you to special summon 50 times.

To do this, I used the deck "Ancient Warriors" (also a great deck to quickly get to platinum rank). Ancient Warriors is a deck that special summons approximately 5 times per-turn and usually wins quickly if you go 2nd. I used this video to get the achievement, although I made some minor modifications for budget reasons:
Additional tips: If your primary goal with Master Duel is to get the achievements, then I'd recommend the following tips:
- Invest your gems in decks that specifically aid to the completion of achievements
- Purchase the duel pass with 600 gems to obtain SR/UR crafting materials
- Do NOT surrender in a duel where you have made progress to an achievement. Stats are added up AFTER the duel has been completed, not during.
- Prioritise getting the achievements BEFORE reaching platinum rank. They become very difficult in higher ranks due to how the game is
- Focus crafting generic staples such as Ash Blossom, Maxx "C", and Pot of Extravagance early as they can be applied to any deck to improve their performance

Just wanted to add that you can combine this with the Necromancer achievement to get two at the same time.