Indestructible equipment will not be destroyed if targeted with a removal spell, unlike other equipment cards that would be destroyed and placed into the graveyard
While you can play around with this if you want, if you're new, you may want to use it as a relatively strict guide
Quina, Qu Gourmet is another good way to get extra creatures, as it tacks an additional Frog token on to any other token creation that you do on your turn
And Ultimecia, Time Sorceress - well, activate her transform ability by paying eight mana and eight cards in your graveyard, and Ultimecia, Omnipotents extra turn ability will likely allow you to win the game on the spot
Once its online, you stop worrying about lands and start thinking about leverage
They also helped me to understand what made a MTG card "good" and how to iterate on existing archetypes