Older cards don't have a set code so, you need to know the symbol for each set to be able to tell on-sight, but a quick search over on Gatherer can help you out when youre not sure
Its not fancy, but its effective
If you want to see more Cube excitement, the holidays is also the time for Cube4Charity, a now annual event I run with Cube master TeamJbro where we duke it out over 48 hours to see who can get the most Magic Online Cube trophies, all while raising money for charity
Shoutouts to Zerb for helping me write the guide and for putting together most of the resources available in the Discord
Its a little tougher to tell with the lighting, but both Shining Gyarados do not look to be double holos either
Lifelinks nice enough, but ward 1 is more of a nuisance than true protection