Muscle Madness

: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.

If a creature you control would deal damage to a permanent or player, it deals double that damage instead.

: Target land becomes a 1/1 creature until end of turn. It's still a land. : Creatures you control get +3/+3 and gain trample until end of turn.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

All lands are 2/2 creatures that are still lands.