+tumble (8)
Spree (Choose one or more additional costs.)
+ — Search your library for a basic land card or a Desert card, put it onto the battlefield, then shuffle.
+ — Create an X/X green Elemental creature token, where X is the number of lands you control.
+1: Venture into the dungeon. (Enter the first room or advance to the next room.)
−2: Look at the top six cards of your library. You may reveal a creature card from among them and put it into your hand. If it's legendary, you gain 3 life. Put the rest on the bottom of your library in a random order.
−7: You get an emblem with "Creatures you control have trample and haste and get +2/+2 for each differently named dungeon you've completed."
(: Add .)
Gate to Tumbledown enters the battlefield tapped.
, : Seek a nonland card. Activate only once.
At the beginning of combat on your turn, put a +1/+1 counter on target creature.
Whenever Ornery Tumblewagg attacks while saddled, double the number of +1/+1 counters on target creature.
Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)
Rough deals 2 damage to each creature without flying.
Tumble deals 6 damage to each creature with flying.
Tumble Magnet enters the battlefield with three charge counters on it.
, Remove a charge counter from Tumble Magnet: Tap target artifact or creature.
Create an X/X green Elemental creature token, where X is the greatest power among creatures you control.
Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)
Gatherer works better in the Companion app!
— Search your library for a basic land card or a Desert card, put it onto the battlefield, then shuffle.
— Create an X/X green Elemental creature token, where X is the number of lands you control.