Minsc can boost Boo or any other creature you control that has trample or haste with +1/+1 counters, or it can sacrifice a creature and deal damage equal to its power to any target, and if the sacrificed creature is a Hamster you get to draw cards equal to its power
We even have some activated abilities, like Grist, the Hunger TideGrist, the Hunger Tide, Professor OnyxProfessor Onyx, Wrenn and SevenWrenn and Seven, and Skola GrovedancerSkola Grovedancer, as well as some nonpermanent spells like Grapple with the PastGrapple with the Past, MulchMulch, and Grisly SalvageGrisly Salvage
So, what motivates people to collect
Include a classic Death and Taxes theme to make things difficult for your opponents, and you should be able to get the most out of Ardenn and Rebbec very quickly