Time Sieve | Encroaching Mycosynth | Delina, Wild Mage

(and one other card)

All permanents on the battlefield.
You control at least four basic lands.
Delina does not have summoning sickness and cannot be blocked and killed by an opponent.

Declare
Delina as an attacker.
Delina triggers, creating at least one nonlegendary token copy of
Phylath with haste.
When the
Phylath token enters the battlefield, its first ability triggers, creating at least four 0/1 Plant creature tokens.
Activate
Time Sieve by tapping it, sacrificing the
Phylath token and the Plant tokens, causing you to take an extra turn after this one.
Repeat each turn.