At the beginning of your upkeep, target non-Wall creature an opponent controls gains forestwalk until your next upkeep. (It can't be blocked as long as defending player controls a Forest.)
: Add .: Mishra's Factory becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.: Target Assembly-Worker creature gets +1/+1 until end of turn.
Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)Enchanted creature has islandwalk. (It can't be blocked as long as defending player controls an Island.)
FlyingTetravus enters with three +1/+1 counters on it.At the beginning of your upkeep, you may remove any number of +1/+1 counters from Tetravus. If you do, create that many 1/1 colorless Tetravite artifact creature tokens. They each have flying and "This creature can't be enchanted."At the beginning of your upkeep, you may exile any number of tokens...
FlyingClockwork Avian enters with four +1/+0 counters on it.At end of combat, if Clockwork Avian attacked or blocked this combat, remove a +1/+0 counter from it., : Put up to X +1/+0 counters on Clockwork Avian. This ability can't cause the total number of +1/+0 counters on Clockwork Avian to be greater than four. Activate only during your upkeep.
