What are the key steps and phases in the game of Magic: The Gathering?

In Magic: The Gathering, the key steps and phases are as follows:

1. Untap Phase: Players untap all their tapped cards.
2. Upkeep Phase: Players may choose to activate abilities or effects that happen at the beginning of their turn.
3. Draw Phase: Players draw a card from their deck.
4. Main Phase: Players can play land cards, cast spells, and use abilities.
5. Combat Phase: Players can attack with their creatures and block their opponent's attacks.
6. Main Phase 2: Players can play additional spells and abilities.
7. End Phase: Players discard down to their maximum hand size and any effects that happen at the end of the turn take place.

These steps and phases are repeated in each player's turn until one player wins the game.