Each of these cards are windows into Magic lore and open up whole new build-around decks
some of the playtest cards
Creature - Goblin Soldier Color tag templates(None) Mogg War Marshal Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters or dies, create a 1/1 red Goblin creature token
The other ability, Team Tardis, lets you untap each creature you control with a counter on it at the beginning of your end step
Many of the originals wanted you to discard cards or exile cards from your hand, often with restrictions on those cards, so youll see a lot of these in the list
I can see and appreciate the design approach here