What are some strategies for building a competitive deck with MTG Blitz cards?

To build a competitive deck with MTG Blitz cards, consider focusing on a specific strategy or theme, including a mix of card types like creatures, spells, and enchantments. Utilize cards that synergize well together and have a strong mana curve. Additionally, pay attention to the card's power level and how they interact with the current meta. Lastly, playtest your deck against different opponents to refine and optimize its performance.