[mwcard=MW1E36]Rhino Hide[/mwcard] ***
Another classic.
Armor makes your stuff last longer. Normally anyway.
With Rhino Hide it can be a bit more tricky to get rid of corrode tokens, but you can cast Rust on yourself then switch Rust to something else with Enchantment Transfusion or Shift Enchantment.
Armor Swapping is a bit easier, but only allows for 2 armor.