My urge is to steer clear from activated abilities unless they are really worth the cost (such as Necrotic Sliver)
Leaving the Shire There's nothing quite like handling fresh cards from a new set, and that's exactly what you get to do at a Prerelease
Check the rarity of the cards The small symbols on each Pokemon card are very important
Then you can exile a graveyard and gain a bunch of life, ramp out two lands of any type not just basics tapped, make a pair of 2/2 Bear tokens, or toss a pair of counters on all of your stuff for the going wide, and with the Bears as a default that's two 4/4s for six mana on a naked board
This menacing card manages to scoot its way into third place, and it's not hard to see why
If it's not your turn to act, it will be greyed out