At the beginning of each player's upkeep, that player puts a flood counter on target non-Island land they control of their choice. That land is an Island for as long as it has a flood counter on it.
At the beginning of each end step, if all lands on the battlefield are Islands, remove all flood counters from them.

Rattleblaze Scarecrow has persist as long as you control a black creature. (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
Rattleblaze Scarecrow has haste as long as you control a red creature.

Create two 1/1 white Kithkin Soldier creature tokens if was spent to cast this spell. Counter up to one target creature spell if was spent to cast this spell. (Do both if was spent.)

Whenever Smart Ass attacks, choose a card name. If defending player has no cards with the chosen name in their hand, they may reveal their hand. If they don't reveal their hand, Smart Ass can't be blocked this turn.

Wither (This deals damage to creatures in the form of -1/-1 counters.)
: Twinblade Slasher gets +2/+2 until end of turn. Activate this ability only once each turn.

Wingrattle Scarecrow has flying as long as you control a blue creature.
Wingrattle Scarecrow has persist as long as you control a black creature. (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)