Silvar, Devourer of the Free has built in protection for your essential combo piece (or enabler for a fair deck) while becoming a massive threat that attacks your opponent on multiple angles
seems random to the human , and so does pile shuffling
If youre generating energy with white mana by choice these days, I hope youre going crazy with Consulate Surveillance and Madcap Experiment
In all formats, Alpine Watchdog is better than Steadfast Guard (okay, barring tribal shenanigans)
What makes this card so good is the ability to bring back cheap creatures, most notably Deaths Shadow in Modern which also acts as a way to reduce life totals
Both Standard both types are popular, but Historic lets you use cards that are in your collection, but have rotated out of Standard