Monster's attack, you can utilize this effect to properly Chain Block your effects
Put a +1/+1 counter on it
You could try to get as many ways to gain life into your deck as possible, but there isnt exactly an excess of those in Rakdos
The more artifacts you hit, the deeper you dig into your deck for a free virtual-dash creature
The most important factors are edition (1st Edition, Shadowless, Unlimited), condition (mint cards command premiums), rarity (holographic, secret rare, full art), age (vintage Base Set cards are highly sought after), and the Pokemon itself (Charizard, Pikachu, and fan favorites are worth more)
When Austere Command was more viable it was devastating