Some cards represent a collection of similar creatures, or a creature who summons lesser underlings as part of their abilities
Seto retorts that the Rose Cards simply grant "power over all", their nature having been twisted by Druid legend, and claims that the Rose Crusaders seek to use such power to create a world free from the ravages of war
Sol Ring provides universal mana acceleration, while Command Tower offers perfect fixing for multicolored strategies
The counters are, again, the same as the video games and tend to follow an obvious logic, such as fire pokmon being weak to water attacks, but its worth having a look at a glossary before you start, to familiarise yourself with the sheer number of cards and what they can do
Once one has decided on their deck, the first thing to do is to check how to obtain all the cards (done via the card details menu and choosing how to obtain)