Enchantment Skeletal Swarming Each Skeleton you control has trample, attacks each combat if able, and gets +X/+0, where X is the number of other Skeletons you control
The game plan of such a deck is very simple deal as much damage as possible as directly as possible to the opponent until they fall over
So, in a three-color deck built around red, white, and blue, aka the Jeskai colors, an Arid Mesa can fetch up a Raugrin Triome, which is a nonbasic land with the mountain, island, and plains types, and subsequently taps for all three corresponding colors
It features the bronze medal design with Pikachu artwork
Letting it get huge and then sacrificing it is also a smart line of play, since itll be followed by tons more sacrifice fodder