Here is the full list of all 49 Magic Duels achievements.
Hit rank 5 in ranked Versus Battles
Hit rank 10 in ranked Versus Battles
Hit rank 15 in ranked Versus Battles
Hit rank 30 in ranked Versus Battles
Hit rank 40 in ranked Versus Battles
Open 10 booster packs
Collect all five Origins Planeswalker cards
Get a mythic rare card
Collect all the mythic rare cards in Magic Duels: Origins
Complete 10 Daily Quests
Complete 100 Daily Quests
Complete 500 Daily Quests