If I play Stupefy with Focus and draw Cleave off it, can I play the Cleave immediately, or does my opponent get Focus and priority to respond first?

Ruling: After your Stupefy resolves, your opponent gains Focus and has priority to play a spell before you can play the Cleave you drew.

Sequence:

• You play Stupefy while having Focus
• Stupefy resolves and you draw Cleave
• Focus passes to your opponent
• Your opponent can play a spell (like Hextech) before you can play Cleave