Trample
Whenever Yidris, Maelstrom Wielder deals combat damage to a player, as you cast spells from your hand this turn, they gain cascade. (When you cast the spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

At the beginning of your upkeep, you gain X life and draw X cards, where X is the number of permanents you own that your opponents control.
: Target opponent gains control of target permanent you control.

: Add .
Whenever you tap Zhur-Taa Druid for mana, it deals 1 damage to each opponent.