Can you play Deadbloom Predator from hand to a battlefield and simultaneously play a ready card from your base to the same battlefield to ensure Deadbloom doesn't attack alone?

Ruling: No, you cannot play both cards simultaneously. Most unit cards and Standard Move are base speed, so they cannot be played at the same time.

Sequence:

• Deadbloom Predator would be played first
• Any additional unit would need to be moved after the showdown has begun

Nuances:

• You can use an Action or Reaction speed effect to move a unit to the battlefield, but this must happen after the showdown has already begun (when Deadbloom is already there)